1. Maintenance of corpus luteum after uterine transfer of trophoblastic vesicles to cyclic cows and ewes;Heyman;J. Reprod. Fertil.,1984
2. Specificity of embryonic signals maintaining corpus luteum in early pregnancy in ruminants;Martal,1984
3. Origin of embryonic signals allowing the establishment of pregnancy corpus luteum in ruminants;Martal,1984
4. Culture and transfer of equine trophoblastic vesicles;Ball,1989
5. Interaction of trophoblastic vesicles with bovine embryos developing in vitro;Heyman,1987