@article{Ballasus2008,
  author    = {Hauke Ballasus},
  title     = {{\"O}kologie und Verhalten {\"u}berwinternder Bless- und Saatg{\"a}nse (Anser a. albifrons Scop. 1769, Anser fabalis rossicus Buturlin 1923) : Faktoren der Koexistenz},
  journal   = {Vogelwarte : Zeitschrift f{\"u}r Vogelkunde},
  volume    = {43},
  number    = {2},
  pages     = {141 -- 142},
  year      = {2008},
}