author  = "M. Kasprzak and M. Ciepliński and A. Steliga and T. Hetmański and P. Kamiński and M. Grandtke and A. Łopińska",
  title   = "Influence of crowding on body mass, serum total protein and aminotransferase (ALT, AST) concentration and activity in the feral pigeon Columbia livia f. urbana",
  journal = "International Studies on Sparrows",
  volume  = "Vol. 40",
  pages   = "5--8",
  year    = "2016",