1. Nursing enhances the negative effect of estrogen on LH release in the cow;Acosta;J. Anim. Sci.,1983
2. Patterns of Mammalian Reproduction;Asdell,1964
3. Oestrus and ovarian activity in lactating Sahiwal-Shorthorn beef cows in south-eastern Queensland;Baker,1968
4. Follicle stimulating hormone, luteinizing hormone and estradiol-17β response in GnRH treated prepuberal Holstein heifers;Barnes;Biol. Reprod.,1980
5. Environmental factors affecting the onset of ovarian post-partum activity in nursing beef cows of Chianina breed treated with GnRH;Boiti,1984