DJVU PDF Gedney, W.J. 1989, "A checklist for determining tones in Tai dialects", in Selected Papers on Comparative Tai Studies, ed. R.J. Bickner et al., pp. 191-206. Center for South and Southeast Asian studies, the University of Michigan. cite.

DJVU PDF Gedney, W.J. 1989, "Speculations on early Tai tones", in Selected Papers on Comparative Tai Studies, ed. R.J. Bickner et al., pp. 207-228. Center for South and Southeast Asian studies, the University of Michigan. cite.