1. The influence of fetal genotype upon endometrial cup development and PMSG and progestagen production in equids;Allen;J. Reprod. Fertil., Suppl.,1975
2. The origin of the equine endometrial cups. I. Production of PMSG by fetal trophoblast cells;Allen;J. Reprod. Fertil.,1972
3. The origin of equine endometrial cups. II. Invasion of the endometrium by trophoblast;Allen;Anat. Rec.,1973
4. The estrous cycle of the dog;Anderson,1959
5. Le cycle sexuel de la chienne. Etude histoligique;Arenas;Bull. Histol. Appl. Pathol.,1939