@article{Plas2000,
author = {Plas, E. and Berger, P. and Hermann, M. and Pfluger, H.},
title= {Effects of aging on male fertility?},
year = {2000},
doi = {10.1016/S0531-5565(00)00120-0},
journal = {Experimental Gerontology},
volume = {35},
number = {5},
pages = {543--551},
}