J.-H. Cao, X.-Q. Zhao, J.-M. Xie, J.-P. Li, B.-F. Feng, and B. Zhang, “A Comparative Study of Tianzhu White Yak’s Blood Copper with Yak’s in Other Sites of Tibetan Plateau”, ajc, vol. 25, no. 4, pp. 2091–2094, Nov. 2012.