DE, BALRAM, SATISH KUMAR, GREESH MOHAN, and K L SAHNI. “Effect of Zwitter Ion Buffers on Freeze Preservation of Holstein-Friesian Spermatozoa under Tropical Climate”. The Indian Journal of Animal Sciences 67, no. 4 (October 24, 2013). Accessed October 24, 2025. https://epubs.icar.org.in/index.php/IJAnS/article/view/34343.