Authors
Maria Katkiewicz
Department of Animal Reproduction and Anatomy, Faculty of Animal Breeding and Biology University of Agriculture in Krakow, Krakow, Poland
Maciej Witkowski
Department of Animal Reproduction and Anatomy, Faculty of Animal Breeding and Biology University of Agriculture in Krakow, Krakow, Poland
Sylwester Zając
Veterinary Clinic, Piaseczno, Poland