DJVU PDF Harris, J.G. 1992, "The consonant sounds of 17th century Siamese", in The Mon-Khmer Studies Journal, vol. 21, pp. 1-17. cite.

DJVU PDF Wanna Tienmee. 1992, "Classification by tone shapes and patterns of tonal splits and coalescences [Thai dialects of Thailand]", in The Mon-Khmer Studies Journal, vol. 21, pp. 229-236. cite.