1E. R. Leach, Introductory Note to the 1964 Reprint of Political Systems of Highland Burma: a study of Kachin Social Structure.
2Charles Keyes, Presidential Address : " The Peoples of Asia" -Science and Politics in the Classification of Ethnic Groups in Thailand, China, and Vietnam. In The Journal of Asian Studies, vol. 61, no. 4 (November 2002).
