DOBOSZYNSKA, Teresa - ZEZULA SZPYRA, Anna - JODCZYK, Kazimierz Jerzy. Morphological basis of the vascular paraovarian plexus functioning during the oestrus cycle in pig and sheep. Warszawa : Wydaw. Naukowe PWN, 1991. 95 s. ISBN 83-01-105399. ISSN 0080-3683.