DJVU PDF Conver, L.C. 1999, "A sketch of the phonology of a Lamet dialect", in The Mon-Khmer Studies Journal, vol. 29, pp. 35-56. cite.
DJVU PDF Suwilai Premsrirat. 1999, "Phonological variation and change in the Khmu dialects of northern Thailand", in The Mon-Khmer Studies Journal, vol. 29, pp. 57-69. cite.
DJVU PDF Vương Hừu Lễ. 1999, "A new interpretation of the Bru Vân Kiêu vowel system", in The Mon-Khmer Studies Journal, vol. 29, pp. 97-106. cite.