https://doi.org/10.1093/molbev/msq336
Wiener, G., Han, J., & Long, R. (Eds.) (2003). The yak. Food and Agriculture Organization of the United Nations
Wang, Z., Shen, X., Liu, B., Su, J., Yonezawa, T., Yu, Y., Guo, S., Ho, S.Y.W., VilĂ , C., Hasegawa, M. and Liu, J. (2010), Phylogeographical analyses of domestic and wild yaks based on mitochondrial DNA: new data and reappraisal. Journal of Biogeography , 37: 2332-2344.