2Compiling Team of Pronunciation and Vocab- ulary of Tibeto - Burman Languages. zangmianyu yuyin he cihui Pronunciation and Vocabulary of Tibeto - Burman Languages). Beijing : minzu chu- banshe, 1991.
3George van Driem. The Trans- Himalayan Phylum and its Implications for Population prehisto- ry. In Newsletter of Modern Anthropology, 2011, (5) :135 -142.
4Graham Turgood and Randy J. LaPolla Ed. The Sino - Tibetan Languages. London: Rout- ledge,Taylor & Francis Group, 2003:14 -19.
5James A. Matisoff : Sino - Tibetan Numerals and the Play of Prefixes, In Research Report of Eth- nology Museum of Japan, 1995, 20( 1 ):107.
6M. Paul Lewis Ed. Ethnologue: Languages of the World Sixteenth Edition Dallas. Texas SIL, 2009.
7Sun Hongkai. shilun zhongguo jingnei zang- mianyu de puxi fenlei ( Genealogical Classification of Tibeto - Burman Languages in China ). In dongya de yuyan he lishi (Language and History of East Asia) , riben songxiangtang, 1988 : 61 - 74.
8Sun Hongkai. zailun xinan minzu zoulang diqu de yuyan fiqi xiangguan wenti ( Further discus- sion on the Languages in Southwest China Ethnic Corridor) and Related Issues. In Journal of South- west University for Nationalities, 2013, ( 6 ) : 35 - 38.
9Sun Hongkai. zailun zangmianyu zhong dong- ci de rencheng fanchou (A Re- discussion on the Personal Verbs in Tibeto -Burman Branch ). In Minority Languages of China, 1994, (4).