Pereira, L., P. R. Bersano, A. Lima, J. C. Pantoja, and M. D. Lopes. “Influence of Anestrus and Diestrus Stages of Oocyte on Meiotic Competence in Bitches”. Brazilian Journal of Veterinary Research and Animal Science, Vol. 52, no. 3, Sept. 2015, pp. 266-72, doi:10.11606/issn.1678-4456.v52i3p266-272.