@phdthesis{Wahl2002,
  author    = {Wahl, Petra},
  title     = {Messung und Charakterisierung laminarer Ozonstrukturen in der polaren Stratosph{\"a}re = Observation and characterization of laminated ozone structures in the polar stratosphere},
  series = {Berichte zur Polar- und Meeresforschung},
  volume    = {411},
  journal   = {Berichte zur Polar- und Meeresforschung},
  publisher = {Alfred-Wegener-Inst. f{\"u}r Polar- und Meeresforschung},
  address   = {Bremerhaven},
  issn      = {1618-3193},
  pages     = {VIII, 143, II S. : Ill., graph. Darst., Kt.},
  year      = {2002},
  language  = {de}
}
@phdthesis{Wahl2001,
  author    = {Wahl, Petra},
  title     = {Messung und Charakterisierung laminarer Ozonstrukturen in der polaren Stratosph{\"a}re},
  pages     = {142 S.},
  year      = {2001},
  language  = {de}
}