@article{Ważna:2018,
  author  = "A. Ważna and J. Cichocki and J. Bojarski and G. Gabryś",
  title   = "Selective foraging on tree and shrub species by the European beaver Castor fiber in lowland and highland habitats in western Poland",
  journal = "Polish Journal of Ecology",
  volume  = "Vol. 66",
  pages   = "286--300",
  year    = "2018",
}