↑ Paul Benedict, Sino-Tibetan: a Conspectus, Cambridge University Press, p. 77. James Matisoff, Handbook of Proto-Tibeto-Burman, University of California Press, 2003, pp. 362-363. Axel Schuessler, ABC Etymological Dictionary of old chinese, University of Hawaii Press, 2006, p. 246.
↑ Shuya Zhang, Guillaume Jacques, and Yunfan Lai, A study of cognates between Gyalrong languages and Old Chinese, Journal of Language Relationship, 17, 2019, p. 83.