Sisca, S., L. Yunaini, and D. A. Pujianto. “Progesterone Decrease Plasma Membrane in Human Sperm With Subnormal Hypoosmotic Swelling Test Scores”. Universa Medicina, vol. 38, no. 1, Apr. 2019, pp. 56-62, doi:10.18051/UnivMed.2019.v38.56-62.