Effects of guanethidine - induced sympathectomy on the spermatogenic and steroidogenic testicular functions of prepubertal to nature rats - Lamano Carvalho, Teresa Lúcia; Guimaraes, M A; Kempinas, W G; Petenusci, Sérgio Olavo; Rosa e Silva, Alzira Amélia Martins (Andrologia, 1996)