@article{KrappmannUhlendorffOswald1999,
  author    = {Krappmann, Lothar and Uhlendorff, Harald and Oswald, Hans},
  title     = {Qualities of Children{\"i}s Friendships in Middle Childhood in East- and West Berlin},
  isbn      = {3-11-016500-7},
  year      = {1999},
  language  = {en}
}
@article{Stoever1999,
  author    = {St{\"o}ver, Bernd},
  title     = {Der Fall Otto John : neue Dokumente zu den Aussagen des deutschen Geheimdienstchefs gegen{\"u}ber MfS und KGB},
  editor    = {Kleßmann, Christoph},
  publisher = {Links},
  address   = {Berlin},
  pages     = {338 S.},
  year      = {1999},
  language  = {de}
}
@article{FischerWinkler1999,
  author    = {Fischer, Markus and Winkler, Eckart},
  title     = {Two fitness measures for clonal plants and the importance of spatial aspects},
  year      = {1999},
  language  = {en}
}
@article{FischerStoecklin1999,
  author    = {Fischer, Markus and St{\"o}cklin, J.},
  title     = {Plants with longer-lived seeds have lower local extinction rates in grassland remnants},
  year      = {1999},
  language  = {en}
}
@article{FischerDietzSchmidt1999,
  author    = {Fischer, Markus and Dietz, H. and Schmidt, B.},
  title     = {Demographic and genetic invasion history of a 9-year-old roadside population of Bunias orientalis L. (Brassicaceae)},
  year      = {1999},
  language  = {en}
}
@article{Belling1999,
  author    = {Belling, Detlev W.},
  title     = {Die Verantwortung des Staats f{\"u}r die Normsetzung durch die Tarifpartner : zur Grundrechtstreue und Legalit{\"a}tskontrolle von Tarifnormen},
  issn      = {0342-328X},
  year      = {1999},
  language  = {de}
}
@article{HenkelWallisWestbrooketal.1999,
  author    = {Henkel, Carsten and Wallis, H. and Westbrook, N. and Aspect, Alain and Sengstock, K. and Ertmer, W.},
  title     = {Theory of atomic diffraction from evanescent waves},
  year      = {1999},
  abstract  = {We review recent theoretical models and experiments dealing with the diffraction of neutral atoms by a reflection grating, formed by a standing evanescent wave. We analyze diffraction mechanisms proposed for confront the theory with experiment.},
  language  = {en}
}
@article{RosenblumAbelKurthsetal.1999,
  author    = {Rosenblum, Michael and Abel, Hans-Henning and Kurths, J{\"u}rgen and Sch{\"a}fer, Carsten},
  title     = {Synchronization in the human cardiorespiratory system},
  year      = {1999},
  language  = {en}
}
@article{BraunFeudelGebogietal.1999,
  author    = {Braun, Robert and Feudel, Fred and Gebogi, C. and Kurths, J{\"u}rgen and Witt, Annette},
  title     = {Tracer dynamics in a flow of driven vortices},
  year      = {1999},
  language  = {en}
}
@article{SchwacheKurthsMitschkeetal.1999,
  author    = {Schwache, A. and Kurths, J{\"u}rgen and Mitschke, F. and Voss, Henning U.},
  title     = {Equations of motion from chaotic data : a driven optical fiber ring resonator},
  year      = {1999},
  language  = {en}
}