Influence of age on the production of rat spermatozoa , on their concentration in the cauda epididymidis , and on fsh, lh and testosterone plasma levels - Lamano Carvalho, Teresa Lúcia; Favaretto, A L V; Komesu, Marilena Chinali; Lopes, R A; Petenusci, Sérgio Olavo; Silva Netto, Cincinato Rodrigues (Histology and Histopathology, 1988)