DJVU PDF Lahaussois, A. 2002, "Vowel tenseness and assimilation in Yi: a feature geometry study", in Linguistics of the Tibeto-Burman Area, vol. 25, no. 1, pp. 211-238. cite.

DJVU PDF Edmondson, J.A. and Ziwo, L. 1999, "Laghuu or Xá Phó and a new language of the Yi group", in Linguistics of the Tibeto-Burman Area, vol. 22, no. 1, pp. 1-10. cite.

DJVU PDF Fu, A. and Wu, Z. 1991, "The 5th International Yi-Burmese Conference: a description", in Linguistics of the Tibeto-Burman Area, vol. 14, no. 2, pp. 171-177. cite.

DJVU PDF Matisoff, J.A. 1991, "Notes on the 5th Yi-Burmese Conference and subsequent peregrinations", in Linguistics of the Tibeto-Burman Area, vol. 14, no. 2, pp. 179-183. cite.