@article{WallschlaegerHelb1994,
  author    = {Wallschl{\"a}ger, Hans-Dieter and Helb, Hans-Wolfgang},
  title     = {Geographic variation in the scarlet grosbeak : research notes on avian biology},
  year      = {1994},
  language  = {en}
}
@article{WallschlaegerMarckardt1996,
  author    = {Wallschl{\"a}ger, Hans-Dieter and Marckardt, J{\"o}rg},
  title     = {Feuchtgebiete},
  year      = {1996},
  language  = {de}
}
@article{WallschlaegerRathgeber2006,
  author    = {Wallschl{\"a}ger, Hans-Dieter and Rathgeber, J{\"o}rg},
  title     = {Beitr{\"a}ge zur Biologie einiger Spechtarten in S{\"u}dbrasilien},
  issn      = {0030-5723},
  year      = {2006},
  language  = {de}
}
@article{WallschlaegerRutschke1998,
  author    = {Wallschl{\"a}ger, Hans-Dieter and Rutschke, Erich},
  title     = {Management von wandernden Wasservogelarten im Land Brandenburg, die Sch{\"a}den an landwirtschaftlichen Kulturen verursachen},
  year      = {1998},
  language  = {de}
}
@article{WallschlaegerWiegleb2000,
  author    = {Wallschl{\"a}ger, Hans-Dieter and Wiegleb, Gerhard},
  title     = {Offenland-Management auf ehemaligen und in Nutzung befindlichen Truppen{\"u}bungspl{\"a}tzen im pleistoz{\"a}nen Flachland Nordostdeutschlands : naturschutzfachliche Grundlagen und praktische Anwendungen},
  year      = {2000},
  language  = {de}
}
@article{WonkeWallschlaeger2009,
  author    = {Wonke, Gundula and Wallschl{\"a}ger, Hans-Dieter},
  title     = {Song dialects in the yellowhammer Emberiza citrinella : bioacoustic variation between and within dialects},
  issn      = {0021-8375},
  doi       = {10.1007/s10336-008-0326-6},
  year      = {2009},
  abstract  = {The yellowhammer Emberiza citrinella is a common European bird that sings in dialects that for decades have been distinguished by the existence of one single element (called a "specific''). In this study we looked into other possibilities for dialect discrimination, measuring 24 different variables. For the first time, multivariate statistics were used to discriminate dialect in yellowhammer song. Two similar dialects (XlB and XsB) that are not clearly defined in the literature were studied. Statistics incorporated (1) all variables, ( 2) no variables of "specific'' elements, and (3) no variables under the influence of these "specific'' variables. Multivariate statistics support dialect discrimination by ear and confirmed that only one element in yellowhammer song characterises dialect. In addition, we looked for local differences within two dialects and found that one local observation area showed a higher separation than the other sites (Meck1). However, as yet there is insufficient evidence for the existence of a new subdialect.},
  language  = {en}
}