DJVU PDF Edmondson, J.A. 1992, "A study of the tones and initials in Kam, Lakkja, and Hlai", in Papers on Tai languages, Linguistics, and Literatures, ed. C.J. Compton and J.F. Hartmann, pp. 77-102. Center for Southeast Asian Studies, Northern Illinois University. cite.

DJVU PDF Kosaka, R. 2007, "Consonantal lenition and vocalic transfer in Kadai languages: with disyllabic proto-Be-Tai as supporting evidence", in SEALS XIII Papers from the 13th Annual Meeting of the Southeast Asian Linguistics Society 2003, ed. I. Shoichi et al., Canberra, Australia, pp. 93-103. Pacific Linguistics, Research School of Pacific and Asian Studies, The Australian National University. cite.