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DJVU PDF Watters, D.E. 1985, "Emergent word tone in Kham: the evolution of a Tibeto-Burman halfway house", in Linguistics of the Tibeto-Burman Area, vol. 8, no. 2, pp. 36-54. cite.

DJVU PDF Watters, D.E. 1975, "The evolution of a Tibeto-Burman pronominal verb morphology", in Linguistics of the Tibeto-Burman Area, vol. 2, no. 1, pp. 45-79. cite.