Sumano H, Gracia I, Capistrán A, Meade G, Rivero A, Ruiz-Ramírez L
Department of Pharmacology, Faculty of Veterinary Medicine and Husbandry, Universidad Nacional Autónoma de México, (UNAM) Mexico City.
Br Poult Sci. 1995 Jul;36(3):503-7. doi: 10.1080/00071669508417795.