@article{Fedyk:2011,
  author  = "S. Fedyk and W. ChÍtnicki and A. Ruprecht and J. Cichocki",
  title   = "Chromosome polymorphism in Polish populations of northern birch mouse Sicista betulina",
  journal = "Folia Zoologica",
  volume  = "Vol. 60",
  number  = "no 1",
  pages   = "31--36",
  year    = "2011",
}