1. Embryo transfer in cattle 10–17 days after oestrus;Betteridge,1976
2. Nonsurgical embryo transfer in cattle;Brand,1975
3. Cattle twinning by the egg transfer approach;Gordon,1975
4. Experiences with nonsurgical transfer techniques;Hahn,1974
5. Experiments on egg transfer procedure and stage of the oestrus cycle;Lawson;J. Reprod. Fert.,1975