1. Progesterone concentration in peripheral blood plasma of heifers following combined PMSG/PGF2 treatment in comparison with values during a normal cycle;Agthe;Berl. Müch. tierärtzl. Wschr.,1976
2. Plasmaestrogen and progesterone in relation to superovulation and egg recovery in the cow;Booth;Vet. Rec.,1975
3. Superovulation and non-surgical embryo-recovery in lactating dairy cows;Brand,1977
4. de Kruif, A.: Personal communication. Utrecht 1975.
5. A device for non-surgical recovery of bovine embryos;Drost;Theriogenology,1976