Muhammad Hammad Fayyaz, S. Murtaza Hassan Andrabi and Muhammad Shafiq Haider, 2022. Effect of Glutathione and L-Cysteine Supplementation on the Quality of Frozen Beetal Buck Spermatozoa. Pakistan J. Zool., 54:2473-2475 . 
DOI: https://dx.doi.org/10.17582/journal.pjz/20190422070439