MUHAMMAD OWAIS AHMAD , UMAY KALSOOM,INAM-UL-HAQ. Comparative Study of Sperm Concentration in Pakistani Men. Journal of Rawalpindi Medical College, Rawalpindi, Pakistan, v. 19, n. 2, 2015. Disponível em: https://journalrmc.com/index.php/JRMC/article/view/283. Acesso em: 8 dec. 2025.