1. Evidence for the decreasing quality of semen during the past 50 years;Br Med J,1992
2. Seeds of concern;Nature,2004
3. Guillette LJ Jr, Jegou B, Jensen TK, Jouannet P, Keiding N, Leffers H, McLachlan JA, Meyer O, Müller J, Rajpert-De Meyts E, Scheike T, Sharpe RM, Sumpter JS, Skakkebaek NE. Male reproductive health and environmental xenoestrogens;Environ Health Perspect,1996
4. Hormones and testis development and the possible adverse effects of environmental chemicals;Toxicol Lett,2001
5. Declining sperm counts in men—is there an endocrine cause?;J Endocrinol,1993