@article{HinzSchwarz2022,
  author    = {Hinz, Michael and Schwarz, Michael},
  title     = {A note on Neumann problems on graphs},
  series = {Positivity},
  volume    = {26},
  journal   = {Positivity},
  number    = {4},
  publisher = {Springer},
  address   = {Dordrecht},
  issn      = {1385-1292},
  doi       = {10.1007/s11117-022-00930-0},
  pages     = {23},
  year      = {2022},
  abstract  = {We discuss Neumann problems for self-adjoint Laplacians on (possibly infinite) graphs. Under the assumption that the heat semigroup is ultracontractive we discuss the unique solvability for non-empty subgraphs with respect to the vertex boundary and provide analytic and probabilistic representations for Neumann solutions. A second result deals with Neumann problems on canonically compactifiable graphs with respect to the Royden boundary and provides conditions for unique solvability and analytic and probabilistic representations.},
  language  = {en}
}
@article{KellerSchwarz2018,
  author    = {Keller, Matthias and Schwarz, Michael},
  title     = {The Kazdan-Warner equation on canonically compactifiable graphs},
  series = {Calculus of variations and partial differential equations},
  volume    = {57},
  journal   = {Calculus of variations and partial differential equations},
  number    = {2},
  publisher = {Springer},
  address   = {Heidelberg},
  issn      = {0944-2669},
  doi       = {10.1007/s00526-018-1329-7},
  pages     = {18},
  year      = {2018},
  abstract  = {We study the Kazdan-Warner equation on canonically compactifiable graphs. These graphs are distinguished as analytic properties of Laplacians on these graphs carry a strong resemblance to Laplacians on open pre-compact manifolds.},
  language  = {en}
}
@article{KellerSchwarz2020,
  author    = {Keller, Matthias and Schwarz, Michael},
  title     = {Courant's nodal domain theorem for positivity preserving forms},
  series = {Journal of spectral theory},
  volume    = {10},
  journal   = {Journal of spectral theory},
  number    = {1},
  publisher = {EMS Publishing House},
  address   = {Z{\"u}rich},
  issn      = {1664-039X},
  doi       = {10.4171/JST/292},
  pages     = {271 -- 309},
  year      = {2020},
  abstract  = {We introduce a notion of nodal domains for positivity preserving forms. This notion generalizes the classical ones for Laplacians on domains and on graphs. We prove the Courant nodal domain theorem in this generalized setting using purely analytical methods.},
  language  = {en}
}
@book{KargSchopperPaschkeetal.2007,
  author    = {Karg, Detlef and Schopper, Franz and Paschke, Ralph and Meyer, Michael and Ackermann, Irmgard and Baxmann, Matthias and Buchinger, Marie-Luise and Cante, Marcus and Dreger, Hans-Joachim and Gramlich, Sybille and Schwarz, Ulrike and H{\"u}bener, Dieter and Metzler, Matthias and Niemann, Alexander and Rohowski, Ilona and Senst, Ingetraud and Groß, Wera},
  title     = {Denkmalentdeckungen},
  editor    = {Brandenburgisches Landesamt f{\"u}r Denkmalpflege und Arch{\"a}ologisches Landesmuseum,},
  edition   = {1200},
  publisher = {Wernersche Verlagsgesellschaft},
  address   = {Worms},
  isbn      = {978-3-88462-244-5},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-72290},
  publisher      = {Universit{\"a}t Potsdam},
  pages     = {288},
  year      = {2007},
  abstract  = {»Wenn du reisen willst, mußt du die Geschichte dieses Landes kennen und lieben. Das ist ganz unerl{\"a}ßlich. [...] Wag' es getrost und du wirst es nicht bereuen. Eigent{\"u}mliche Freuden und Gen{\"u}sse werden dich begleiten. Du wirst Entdeckungen machen, denn {\"u}berall wohin du kommst, wirst du, vom Touristenstandpunkt aus, eintreten wie in ›jungfr{\"a}uliches Land‹. Du wirst Klosterruinen begegnen, von deren Existenz h{\"o}chstens die n{\"a}chste Stadt eine leise Kenntnis hatte; du wirst inmitten alter Dorfkirchen, deren zerbr{\"o}ckelter Schindelturm nur auf Elend deutete, große Wandbilder oder in den treppenlosen Gr{\"u}ften reiche Kupfers{\"a}rge mit Kruzifix und vergoldeten Wappenschildern finden; du wirst Schlachtfelder {\"u}berschreiten, Wendenkirchh{\"o}fe, Heidengr{\"a}ber, von denen die Menschen nichts mehr wissen.« Die in diesem Bildband gesammelten »Denkmalentdeckungen« verstehen sich als Einladung zu einer Reise durch das Land Brandenburg. Theodor Fontane hatte f{\"u}r ein solches Unternehmen genau den richtigen Blick, als er in seinen »Wanderungen durch die Mark Brandenburg« 1864 diese S{\"a}tze schrieb. Auch heute noch sollten wir seiner Anregung zu Begegnungen mit der Geschichte und der Kunstgeschichte des Landes folgen, die uns im Dialog der Kulturen und der Zeiten eine Standortbestimmung in der Gegenwart und eine Orientierung f{\"u}r die Zukunft zugleich bietet.},
  language  = {de}
}
@article{RistowHerrmannIlligetal.2006,
  author    = {Ristow, Michael and Herrmann, Andreas and Illig, Hubert and Klemm, Gunther and Kummer, Volker and Kl{\"a}ge, Hans-Christian and Machatzi, Bernd and Raetzel, Stefan and Schwarz, R. and Zimmermann, Friedrich},
  title     = {Liste und Rote Liste der etablierten Gef{\"a}ßpflanzen Brandenburgs},
  year      = {2006},
  language  = {de}
}
@misc{AnischAndressBancareletal.2011,
  author    = {Anisch, Michael and Andress, Reinhard and Bancarel, Gilles and Reich, Karin and Roussanova, Elena and Biermann, Kurt-Reinhard and Schwarz, Ingo},
  title     = {HiN : Alexander von Humboldt im Netz},
  volume    = {XII},
  number    = {22},
  editor    = {Ette, Ottmar and Knobloch, Eberhard},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/hinvol12iss222011},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57503},
  pages     = {91},
  year      = {2011},
  abstract  = {Inhalt: - Michael Anisch: Bloß keine Tiziane! Poker um den Posten des Generaldirektors der Kunstmuseen - Reinhard Andress: Alexander von Humboldt und Carlos Mont{\´u}far als Reisegef{\"a}hrten: ein Vergleich ihrer Tageb{\"u}cher zum Chimborazo-Aufstieg - Gilles Bancarel: L'Histoire des deux Indes ou la d{\´e}couverte de la mondialisation - Karin Reich: Alexander von Humboldt und Carl Friedrich Gauß als Wegbereiter der neuen Disziplin Erdmagnetismus - Elena Roussanova: Russland ist seit jeher das gelobte Land f{\"u}r Magnetismus gewesen: Alexander von Humboldt, Carl Friedrich Gauß und die Erforschung des Erdmagnetismus in Russland -Kurt-R. Biermann/Ingo Schwarz: Gef{\"a}lschter Humboldt (mit einer Einleitung von Ulrich P{\"a}ßler)},
  language  = {mul}
}
@article{KellerLenzSchmidtetal.2019,
  author    = {Keller, Matthias and Lenz, Daniel and Schmidt, Marcel and Schwarz, Michael},
  title     = {Boundary representation of Dirichlet forms on discrete spaces},
  series = {Journal de Math{\´e}matiques Pures et Appliqu{\´e}es},
  volume    = {126},
  journal   = {Journal de Math{\´e}matiques Pures et Appliqu{\´e}es},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0021-7824},
  doi       = {10.1016/j.matpur.2018.10.005},
  pages     = {109 -- 143},
  year      = {2019},
  abstract  = {We describe the set of all Dirichlet forms associated to a given infinite graph in terms of Dirichlet forms on its Royden boundary. Our approach is purely analytical and uses form methods. (C) 2018 Elsevier Masson SAS.},
  language  = {en}
}
@misc{KannSchwarz2021,
  author    = {Kann, Oliver and Schwarz, Michael},
  title     = {Einleitung: Milit{\"a}risches Wissen vom 16. bis zum 19. Jahrhundert},
  series = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit = Themenheft: Milit{\"a}risches Wissen vom 16. bis zum 19. Jahrhundert},
  volume    = {22},
  journal   = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit = Themenheft: Milit{\"a}risches Wissen vom 16. bis zum 19. Jahrhundert},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-495-1},
  issn      = {1617-9722},
  doi       = {10.25932/publishup-51588},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-515888},
  pages     = {5 -- 16},
  year      = {2021},
  language  = {de}
}
@misc{ThiemerSachseSchwarzZeuske2003,
  author    = {Thiemer-Sachse, Ursula and Schwarz, Ingo and Zeuske, Michael},
  title     = {HiN : Alexander von Humboldt im Netz},
  volume    = {IV},
  number    = {6},
  editor    = {Ette, Ottmar and Knobloch, Eberhard},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {2568-3543},
  doi       = {10.18443/hinvol4iss062003},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-424361},
  pages     = {66},
  year      = {2003},
  abstract  = {Inhalt: - Ursula Thiemer-Sachse: El "Museo hist{\´o}rico indiano" de Lorenzo Boturini Benaduci y los esfuerzos del erudito alem{\´a}n Alejandro de Humboldt para preservar sus restos para una interpretaci{\´o}n cient{\´i}fica - Ursula Thiemer-Sachse: Petroglifos en rocas de la Cordillera de la Costa as{\´i} como en los raudales de los r{\´i}os de la selva virgen venezolana. La interpretaci{\´o}n por Alejandro de Humboldt y observaciones actuales - Ingo Schwarz: „Ein beschr{\"a}nkter Verstandesmensch ohne Einbildungskraft" - Anmerkungen zu Friedrich Schillers Urteil {\"u}ber Alexander von Humboldt - Michael Zeuske: Humboldteanizaci{\´o}n del mundo occidental? La importancia del viaje de Humboldt para Europa y Am{\´e}rica Latina},
  language  = {de}
}
@article{KomalapriyaRomanoBlascoThieletal.2009,
  author    = {Komalapriya, Chandrasekaran and Romano Blasco, Maria Carmen and Thiel, Marco and Schwarz, Udo and Kurths, J{\"u}rgen and Simonotto, Jennifer and Furman, Michael and Ditto, William L. and Carney, Paul R.},
  title     = {Analysis of high-resulution microelectrode EEG recordings in an animal model of spontaneous limbic seizures},
  issn      = {0218-1274},
  doi       = {10.1142/S0218127409023226},
  year      = {2009},
  language  = {en}
}
@article{PremontSchwarzSchreckIannuzzietal.2015,
  author    = {Premont-Schwarz, Mirabelle and Schreck, Simon and Iannuzzi, Marcella and Nibbering, Erik T. J. and Odelius, Michael and Wernet, Philippe},
  title     = {Correlating Infrared and X-ray Absorption Energies for Molecular-Level Insight into Hydrogen Bond Making and Breaking in Solution},
  series = {The journal of physical chemistry : B, Condensed matter, materials, surfaces, interfaces \& biophysical chemistry},
  volume    = {119},
  journal   = {The journal of physical chemistry : B, Condensed matter, materials, surfaces, interfaces \& biophysical chemistry},
  number    = {25},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {1520-6106},
  doi       = {10.1021/acs.jpcb.5b02954},
  pages     = {8115 -- 8124},
  year      = {2015},
  abstract  = {While ubiquitous, the making and breaking of hydrogen bonds in solution is notoriously difficult to study due to the associated complex changes of nuclear and electronic structures. With the aim to reduce the according uncertainty in correlating experimental observables and hydrogen-bond configurations, we combine the information from proximate methods to study the N-H center dot center dot center dot O hydrogen bond in solution. We investigate hydrogen-bonding of the N-H group of N-methylaniline with oxygen from liquid DMSO and acetone with infrared spectra in the N-H stretching region and X-ray absorption spectra at the N K-edge. We experimentally observe blue shifts of the infrared stretching band and an X-ray absorption pre-edge peak when going from DMSO to acetone. With ab initio molecular dynamics simulations and calculated spectra, we qualitatively reproduce the experimental observables but we do not reach quantitative agreement with experiment. The infrared spectra support the notion of weakening the N-H center dot center dot center dot O hydrogen bond from DMSO to acetone. However, we fail to theoretically reproduce the measured shift of the X-ray absorption pre-edge peak. We discuss possible shortcomings of the simulation models and spectrum calculations. Common features and distinct differences with the O-H center dot center dot center dot O hydrogen bond are highlighted, and the implications for monitoring hydrogen-bond breaking in solution are discussed.},
  language  = {en}
}
@phdthesis{Schwarz2020,
  author    = {Schwarz, Michael},
  title     = {Nodal domains and boundary representation for Dirichlet forms},
  school      = {Universit{\"a}t Potsdam},
  pages     = {164},
  year      = {2020},
  language  = {en}
}
@article{SitzSchwarzKurthsetal.2001,
  author    = {Sitz, Andre and Schwarz, Udo and Kurths, J{\"u}rgen and Maus, Doris and Wiese, Michael and Warnecke, G{\"u}nter},
  title     = {Signatures of acoustic emission signals generated during high speed cutting},
  year      = {2001},
  abstract  = {Acoustic emission signals generated during high speed cutting of steel are investigated. The data are represen ted in time-folded form. Several methods from linear and nonlinear data analysis based on time- and frequency- domain are applied to the data and reveal signatures of the observed acoustic emission signal. These investiga tions are necessary for modeling the cutting process by means of differential equations.},
  language  = {en}
}
@article{TimmerSchwarzVossetal.2000,
  author    = {Timmer, Jens and Schwarz, Udo and Voss, Henning U. and Wardinski, Ingo and Belloni, Tomaso and Hasinger, G{\"u}nther and VanDerKlis, Michael and Kurths, J{\"u}rgen},
  title     = {Linear and Nonlinear Time Series Analysis of the Black Hole Candidate Cygnus X-1},
  year      = {2000},
  abstract  = {We analyze the variability in the x-ray lightcurves of the black hole candidate Cygnus X-1 by linear and nonlinear time series analysis methods. While a linear model describes the overall second order properties of the observed data well, surrogate data analysis reveals a significant deviation from linearity. We discuss the relation between shot noise models usually applied to analyze these data and linear stochastic autoregressive models. We debate statistical and interpretational issues of surrogate data testing for the present context. Finally, we suggest a combination of tools from linear and nonlinear time series analysis methods as a procedure to test the predictions of astrophysical models on observed data.},
  language  = {en}
}
@misc{KannSchwarzDethloffetal.2021,
  author    = {Kann, Oliver and Schwarz, Michael and Dethloff, Andreas and Mende, Volker and Thiele, Andrea and Meumann, Markus and Rous, Anne-Simone},
  title     = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit = Themenheft: Milit{\"a}risches Wissen vom 16. bis zum 19. Jahrhundert},
  volume    = {22},
  editor    = {Kann, Oliver and Schwarz, Michael},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-495-1},
  issn      = {1617-9722},
  doi       = {10.25932/publishup-47471},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-474718},
  pages     = {233},
  year      = {2021},
  abstract  = {Milit{\"a}rgeschichte und Wissensgeschichte bilden zwei in den vergangenen Jahrzehnten international prosperierende Forschungsfelder, die bislang aber selten miteinander in Dialog getreten sind. Das Themenheft nimmt dies zum Anlass, exemplarisch die Potentiale wissensgeschichtlicher Perspektiven f{\"u}r die (fr{\"u}h-)neuzeitliche Milit{\"a}rgeschichte auszuloten und dabei zugleich den bislang oft unreflektierten Z{\"a}surcharakter der Jahre um 1800 kritisch zu beleuchten. Gab es eine eigene milit{\"a}rische Wissenskultur oder inwieweit partizipierte das Milit{\"a}r an den zivilen Wissenskulturen seiner sozialen Umwelt? Welche Akteure, welche Praktiken und welche Medien spielten eine Rolle bei der Verwissenschaftlichung des Milit{\"a}rischen im Wandel von der Kriegskunst zur Kriegswissenschaft? Gerade der geweitete analytische Horizont der Wissensgeschichte erm{\"o}glicht es, der Vielfalt der Wissensformen Rechnung zu tragen und entsprechende Entwicklungen angemessen in ihren historischen Kontexten zu verorten. Dar{\"u}ber hinaus bietet der epochen{\"u}bergreifende Zuschnitt die Chance, nicht nur Br{\"u}che, sondern auch m{\"o}gliche Kontinuit{\"a}ten zwischen fr{\"u}hneuzeitlichem und neuzeitlichem Milit{\"a}rwesen sowie dessen Beziehungen zum Wissen aufzuzeigen und etwaige Ungenauigkeiten oder historiographisch bedingte Verk{\"u}rzungen durch neue Akzentsetzungen zu korrigieren.},
  language  = {de}
}
@inproceedings{KurbelNowakAzodietal.2015,
  author    = {Kurbel, Karl and Nowak, Dawid and Azodi, Amir and Jaeger, David and Meinel, Christoph and Cheng, Feng and Sapegin, Andrey and Gawron, Marian and Morelli, Frank and Stahl, Lukas and Kerl, Stefan and Janz, Mariska and Hadaya, Abdulmasih and Ivanov, Ivaylo and Wiese, Lena and Neves, Mariana and Schapranow, Matthieu-Patrick and F{\"a}hnrich, Cindy and Feinbube, Frank and Eberhardt, Felix and Hagen, Wieland and Plauth, Max and Herscheid, Lena and Polze, Andreas and Barkowsky, Matthias and Dinger, Henriette and Faber, Lukas and Montenegro, Felix and Czach{\´o}rski, Tadeusz and Nycz, Monika and Nycz, Tomasz and Baader, Galina and Besner, Veronika and Hecht, Sonja and Schermann, Michael and Krcmar, Helmut and Wiradarma, Timur Pratama and Hentschel, Christian and Sack, Harald and Abramowicz, Witold and Sokolowska, Wioletta and Hossa, Tymoteusz and Opalka, Jakub and Fabisz, Karol and Kubaczyk, Mateusz and Cmil, Milena and Meng, Tianhui and Dadashnia, Sharam and Niesen, Tim and Fettke, Peter and Loos, Peter and Perscheid, Cindy and Schwarz, Christian and Schmidt, Christopher and Scholz, Matthias and Bock, Nikolai and Piller, Gunther and B{\"o}hm, Klaus and Norkus, Oliver and Clark, Brian and Friedrich, Bj{\"o}rn and Izadpanah, Babak and Merkel, Florian and Schweer, Ilias and Zimak, Alexander and Sauer, J{\"u}rgen and Fabian, Benjamin and Tilch, Georg and M{\"u}ller, David and Pl{\"o}ger, Sabrina and Friedrich, Christoph M. and Engels, Christoph and Amirkhanyan, Aragats and van der Walt, Est{\´e}e and Eloff, J. H. P. and Scheuermann, Bernd and Weinknecht, Elisa},
  title     = {HPI Future SOC Lab},
  editor    = {Meinel, Christoph and Polze, Andreas and Oswald, Gerhard and Strotmann, Rolf and Seibold, Ulrich and Schulzki, Bernhard},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-102516},
  pages     = {iii, 154},
  year      = {2015},
  abstract  = {Das Future SOC Lab am HPI ist eine Kooperation des Hasso-Plattner-Instituts mit verschiedenen Industriepartnern. Seine Aufgabe ist die Erm{\"o}glichung und F{\"o}rderung des Austausches zwischen Forschungsgemeinschaft und Industrie. Am Lab wird interessierten Wissenschaftlern eine Infrastruktur von neuester Hard- und Software kostenfrei f{\"u}r Forschungszwecke zur Verf{\"u}gung gestellt. Dazu z{\"a}hlen teilweise noch nicht am Markt verf{\"u}gbare Technologien, die im normalen Hochschulbereich in der Regel nicht zu finanzieren w{\"a}ren, bspw. Server mit bis zu 64 Cores und 2 TB Hauptspeicher. Diese Angebote richten sich insbesondere an Wissenschaftler in den Gebieten Informatik und Wirtschaftsinformatik. Einige der Schwerpunkte sind Cloud Computing, Parallelisierung und In-Memory Technologien. In diesem Technischen Bericht werden die Ergebnisse der Forschungsprojekte des Jahres 2015 vorgestellt. Ausgew{\"a}hlte Projekte stellten ihre Ergebnisse am 15. April 2015 und 4. November 2015 im Rahmen der Future SOC Lab Tag Veranstaltungen vor.},
  language  = {en}
}
@article{Schwarz2021,
  author    = {Schwarz, Michael},
  title     = {Die Genese von Milit{\"a}rreglements},
  series = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit = Themenheft: Milit{\"a}risches Wissen vom 16. bis zum 19. Jahrhundert},
  volume    = {22},
  journal   = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit = Themenheft: Milit{\"a}risches Wissen vom 16. bis zum 19. Jahrhundert},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-495-1},
  issn      = {1617-9722},
  doi       = {10.25932/publishup-51532},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-515323},
  pages     = {51 -- 85},
  year      = {2021},
  language  = {de}
}
@article{GoetzeWeskottEndrissetal.2007,
  author    = {G{\"o}tze, Michael and Weskott, Thomas and Endriss, Cornelia and Fiedler, Ines and Hinterwimmer, Stefan and Petrova, Svetlana and Schwarz, Anne and Skopeteas, Stavros and Stoel, Ruben},
  title     = {Information structure},
  series = {Interdisciplinary studies on information structure : ISIS},
  journal   = {Interdisciplinary studies on information structure : ISIS},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1614-4708},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-22277},
  pages     = {147 -- 187},
  year      = {2007},
  abstract  = {The guidelines for Information Structure include instructions for the annotation of Information Status (or 'givenness'), Topic, and Focus, building upon a basic syntactic annotation of nominal phrases and sentences. A procedure for the annotation of these features is proposed.},
  language  = {en}
}
@misc{GuentherScholzZimmermannetal.2016,
  author    = {G{\"u}nther, Oliver and Scholz, Jana and Zimmermann, Matthias and Lang, Agnetha and Kampe, Heike and Horn-Conrad, Antje and Eckardt, Barbara and Pohlmann, Markus and Engel, Silke and Hackel, Manuela and Lenhard, Michael and Schwarz, Wolfgang},
  title     = {Portal = Schillernd, sensibel, kraftvoll: Meere und Ozeane},
  number    = {03/2016},
  organization    = {Universit{\"a}t Potsdam, Referat f{\"u}r Presse- und {\"O}ffentlichkeitsarbeit},
  issn      = {1618-6893},
  doi       = {10.25932/publishup-44067},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-440678},
  pages     = {46},
  year      = {2016},
  abstract  = {Aus dem Inhalt: - Schillernd, sensibel, kraftvoll: Meere und Ozeane - Erdoberfl{\"a}che im Fokus - Reine Theorie},
  language  = {de}
}