fitrianto, alif imam. “Multiple Injection of Human Wharton’s Jelly Mesenchymal Stem Cells Ameliorate Spermatogenic Cells on Physiological Aging Male Rats”. Journal of Stem Cell Research and Tissue Engineering 3, no. 1 (December 11, 2019): 1–5. Accessed February 22, 2025. https://e-journal.unair.ac.id/JSCRTE/article/view/16323.