@article{KrohnMaterneSchlutowetal.1999,
  author    = {Krohn, Arne and Materne, Stefanie and Schlutow, A. and Wilhelm, R. and Metzdorf, R. and Wilk, B. and F{\"o}rster, B. and Schade, Bernd and Kitzig, Angelika and M{\"u}ller, J{\"o}rg and Haase, Walter and R{\"u}ckert-John, Jana},
  title     = {Agenda 21-Prozesse f{\"u}r zukunftsf{\"a}hige Kommunen in Brandenburg},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-4120},
  year      = {1999},
  abstract  = {Agenda 21-Prozesse f{\"u}r zukunftsf{\"a}hige Kommunen in Brandenburg KROHN, A.: Stadtentwicklung und Lokale Agenda 21 - Zwei Seiten einer Medaille ; MATERNE, S.: Agenda 21 in Oranienburg - die Entwicklung eines Leitbildes ; SCHLUTOW, A.; WILHELM, B.; METZDORF, R.; WILK, B., F{\"O}RSTER, B.: Interessengemeinschaft "{\"O}kologie 2000 - Unternehmer f{\"u}r die Umwelt" - Anstoß der Wirtschaft f{\"u}r eine lokale Agenda 21 in Strausberg ; SCHADE, B.: Agenda 21 im Landkreis Potsdam-Mittelmark - Rahmen f{\"u}r lokale Aktivit{\"a}ten ; KITZIG, A.: Potsdam, Stadt der Toleranz - unterwegs mit Geschichts- und Verantwortungsbewußtsein f{\"u}r die Zukunft. Die Lokale Agenda 21 ; M{\"U}LLER, J.: Umsetzung eines Klimaschutzkonzeptes - Schritte zu einer nachhaltigen Entwicklung der Stadt Eberswalde , HAASE, W.: Eine lokale Agenda 21 f{\"u}r Kleinmachnow , R{\"U}CKERT-JOHN, J.: Auf dem Weg zur Nachhaltigkeit. Ergebnisse einer Dorfstudie},
  language  = {de}
}
@inproceedings{WalterZuritaHerasLeyder2007,
  author    = {Walter, R. and Zurita-Heras, J. and Leyder, J.-C.},
  title     = {Probing clumpy stellar winds with a neutron star},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18024},
  year      = {2007},
  abstract  = {INTEGRAL tripled the number of super-giant high-mass X-ray binaries (sgHMXB) known in the Galaxy by revealing absorbed and fast transient (SFXT) systems. Quantitative constraints on the wind clumping of massive stars can be obtained from the study of the hard X-ray variability of SFXT. A large fraction of the hard X-ray emission is emitted in the form of flares with a typical duration of 3 ksec, frequency of 7 days and luminosity of \$10^{36}\$ erg/s. Such flares are most probably emitted by the interaction of a compact object orbiting at \$\sim10~R_*\$ with wind clumps (\$10^{22 ... 23}\$ g) representing a large fraction of the stellar mass-loss rate. The density ratio between the clumps and the inter-clump medium is \$10^{2 ... 4}\$. The parameters of the clumps and of the inter-clump medium, derived from the SFXT flaring behavior, are in good agreement with macro-clumping scenario and line-driven instability simulations. SFXT are likely to have larger orbital radius than classical sgHMXB.},
  language  = {en}
}