@article{Kasprzak:2006,
  author  = "M. Kasprzak and T. Hetma˝ski and E. Kulczykowska",
  title   = "Changes in hematological parameters in free-living pigeons (Columba livia f. urbana) during the breeding cycle",
  journal = "Journal of Ornithology",
  volume  = "Vol. 147",
  pages   = "599--604",
  year    = "2006",
}