Morphological basis of the vascular paraovarian plexus functioning during the oestrus cycle in pig and sheep / Teresa Doboszynska, Anna Zezula szpyra, Kazimierz Jerzy Jodczyk . Warszawa :  Wydaw. Naukowe PWN , 1991 . 95 s . ISBN 83-01-105399 . [1, of that borrowed 0]