Wardak, Mohammad Kazim, et al. “In-Vitro Propagation of Pre-Pubertal Bovine Spermatogonial Stem Cell in Prepation for Transplantation”. Nangarhar University International Journal of Biosciences, vol. 2, no. 01, Feb. 2023, pp. 15-25, doi:10.70436/nuijb.v2i01.17.