DJVU PDF Delancey, S. 1989, "Contour tones from lost syllables in Central Tibetan", in Linguistics of the Tibeto-Burman Area, vol. 12, no. 2, pp. 33-34. cite.

DJVU PDF Kapfo, K. 1989, "Tones in Khezha noun constructions", in Linguistics of the Tibeto-Burman Area, vol. 12, no. 2, pp. 67-78. cite.

DJVU PDF Matisoff, J.A. 1989, "Tone, intonation, and sound symbolism in Lahu: loading the syllable canon", in Linguistics of the Tibeto-Burman Area, vol. 12, no. 2, pp. 147-163. cite.