Zimmerman, Y., Eijkemans, M., Coelingh Bennink, H., Blankenstein, M., & Fauser, B. (2014). The effect of combined oral contraception on testosterone levels in healthy women: A systematic review and meta-analysis. Oxford University Press.

Zimmerman, Y., M.J.C Eijkemans, H.J.T Coelingh Bennink, M.A Blankenstein, and B.C.J.M Fauser. The Effect of Combined Oral Contraception On Testosterone Levels in Healthy Women: A Systematic Review and Meta-analysis. Oxford University Press, 2014.

Zimmerman, Y., et al. The Effect of Combined Oral Contraception On Testosterone Levels in Healthy Women: A Systematic Review and Meta-analysis. Oxford University Press, 2014.