↑Paul Benedict, Sino-Tibetan: a Conspectus, Cambridge University Press, p. 182. Weldon South Coblin, A Sinologists Handlist of Sino-Tibetan Lexical Comparisons, Steyler Verlag, 1986, p. 47. James Matisoff, Handbook of Proto-Tibeto-Burman, University of California Press, 2003, p. 176.
↑Harry Shorto. A Mon-Khmer Comparative Dictionary. Australian National University, 2006, pp. 178-179.
↑Axel Schuessler, ABC Etymological Dictionary of old chinese, University of Hawaii Press, 2006, p. 255.