Orsi, A. M., Simões, K., Machado, M. R. F. and Domeniconi, R. F. (2009) “Regional ultra structural features of principal cells from the epididymal epithelium lining of Agouti paca”, Brazilian Journal of Veterinary Research and Animal Science, 46(6), pp. 455-464. doi: 10.11606/S1413-95962009000600004.