Mota-Rojas, D., Alonso-Spilsbury, M., Novales, L. M., Trujillo, M. E., Valencia, J., Ramírez-Necoechea, R., Cortés, S. and Ibarra, I. E. (2005) “Changes of vaginal epithelium in creole pigs ovulating during lactation”, Brazilian Journal of Veterinary Research and Animal Science, 42(5), pp. 333-338. doi: 10.11606/issn.1678-4456.bjvras.2005.26409.