Association of Copper-to Zinc Ratio with Sperm Concentration among Males Investigated for Infertility. Journal of Infertility and Reproductive Biology, [S. l.], v. 8, n. 3, p. 49–52, 2020. Disponível em: https://doormaj.com/index.php/jirb/article/view/126. Acesso em: 4 feb. 2026.