Fernando, Trinidad C., and Danilda H. Duran. “Current Trends and Developments in the Use of Assisted Reproductive Technology and Its Application in the Philippine Livestock Improvement Program-A Review”. Buffalo Bulletin, vol. 36, no. 2, June 2017, pp. 263-80, https://kuojs.lib.ku.ac.th/index.php/BufBu/article/view/682.