Hasan, M. M., Islam, M. R., Husain, S. S., & Apu, A. S. (2020). Frozen semen quality and fertility of imported pure Holstein Friesian and Sahiwal breeding bulls in Bangladesh. Asian-Australasian Journal of Bioscience and Biotechnology, 5(1), 33–41. https://doi.org/10.3329/aajbb.v5i1.53861