1. ultrastructure of seminiferous tubules and epididymal cysts in European bisonBison bonasus In Kita eds threats for the European bison particularly in free - roaming populations in pp;Sysa;Health,2006
2. Postnatal development of the European bison spermatogenesis;Czykier;Acta Theriol,1999
3. ultrastructure of seminiferous tubules and epididymal cysts in European bisonBison bonasus In Kita eds threats for the European bison particularly in free - roaming populations in pp;Sysa;Health,2006
4. Cases of spermiogenesis in young European bison;Czykier;Acta Theriol,2004
5. Postnatal development of the European bison spermatogenesis;Czykier;Acta Theriol,1999