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.

DJVU PDF Gedney, W.J. 1989, "Evidence for another series of voiced initials in Proto-Tai", in Selected Papers on Comparative Tai Studies, ed. R.J. Bickner et al., pp. 229-270. Center for South and Southeast Asian studies, the University of Michigan. cite.

DJVU PDF Gedney, W.J. 1989, "A puzzle in comparative Tai phonology", in Selected Papers on Comparative Tai Studies, ed. R.J. Bickner et al., pp. 271-280. Center for South and Southeast Asian studies, the University of Michigan. cite.