DJVU PDF La polla, R.J. 1987, "Dulong and Proto-Tibeto-Burman", in Linguistics of the Tibeto-Burman Area, vol. 10, no. 1, pp. 1-43. cite.
DJVU PDF Tan, K. 1987, "On the evolution of Tibetan final -s", in Linguistics of the Tibeto-Burman Area, vol. 10, no. 1, pp. 152-165. cite.
DJVU PDF Luo, M. 1987, "The evolution of vowel length and final consonants in Dai", in Linguistics of the Tibeto-Burman Area, vol. 10, no. 1, pp. 175-181. cite.