Bibliografia

Hafez, E.S.E. &Hafez, B., 7th Ed. Lippincott Williams & Wilkins, USA (2000) Reproduction in Farm Animals null

Ian Gordon, Cabi Publishing (n/a) 1 - Controlled Reproduction in Cattle and Buffaloes null
Ian Gordon, Cabi Publishing (n/a) 3 - Controlled Reproduction in Pigs null
Ian Gordon, Cabi Publishing (n/a) 2 - Controlled Reproduction in Sheep and goats null
Deer and Camelids (n/a) 4 - Controlled Reproduction in Horses null