Parthenogenetic activation of bovine oocytes using single and combined strontium, ionomycin and 6-dimethylaminopurine treatments - Méo, Simone Cristina; Yamazaki, W.; Ferreira, C. R.; Perecin, F.; Saraiva, N. Z.; Leal, Cláudia Lima Verde; Garcia, J. M. (Zygote, 2007)