DJVU PDF Barker, M.E. 1966, "Vietnamese-Muong tone correspondences", in Studies in Comparative Austroasiatic Linguistics, ed. N.H. Zide, pp. 9-25. Mouton & Co.. cite.

DJVU PDF Thomas, D.D. 1966, "Appendix: a note on Proto-Viet-Muong tones", in Studies in Comparative Austroasiatic Linguistics, ed. N.H. Zide, pp. 26-27. Mouton & Co.. cite.

DJVU PDF Li, F.-K. 1966, "The relationship between tones and initials in Tai", in Studies in Comparative Austroasiatic Linguistics, ed. N.H. Zide, pp. 82-88. Mouton & Co.. cite.

DJVU PDF Zide, N.H. 1966, "Korku low tone and the Proto-Korku-Kherwarian vowel system", in Studies in Comparative Austroasiatic Linguistics, ed. N.H. Zide, pp. 214-1000. Mouton & Co.. cite.