Supplementation of hCG, progesterone and 17 beta-oestradiol on in vitro maturation of oocytes from bitches at different stages of the oestrus cycle - Apparicio, M.; Pires, E. A.; Ribeiro, A. P. C.; Saraiva, N. Z.; Alves, A. E.; Covizzi, G. J.; Vicente, W. R. R. (Blackwell Publishing, 2006)