Keskin, M., S. Budak, T. Zeyrek, O. Çelik, O. Mertoglu, M. Yoldas, and Y. Ilbey. “The Relationship Between Serum Hormone Levels (follicle-Stimulating Hormone, Luteinizing Hormone, Total Testosterone) and Semen Parameters”. Archivio Italiano Di Urologia E Andrologia, Vol. 87, no. 3, Sept. 2015, pp. 194-7, doi:10.4081/aiua.2015.3.194.