DJVU PDF Preecha Sukgasame. 2005, "Phonological variations and changes due to language contact: A case study of consonants in four Kuai-Kui (Suai) dialects", in The Mon-Khmer Studies Journal, vol. 35, pp. 37-54. cite.

DJVU PDF Ratree P. Wayland and Guion, S.G. 2005, "Sound changes following the loss of /r/ in Khmer: a new tonogenetic Mechanism?", in The Mon-Khmer Studies Journal, vol. 35, pp. 55-82. cite.