"Interspecies Hybridization between Yak, Bos taurus and Bos indicus and Reproduction of the Hybrids (14 Dec 2000.) R.C. Zhang. In: Recent Advances in Yak Reproduction, Zhao X.X. and Zhang R.C. (Eds.). International Veterinary Information Service. http://www.ivis.org/advances/Zhao/zhang3/IVIS.pdf.
