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 Wilson, R.S. 1966, "A comparison of Mu'o'ng with some Mon-Khmer languages", in Studies in Comparative Austroasiatic Linguistics, ed. N.H. Zide, pp. 203-213. Mouton & Co.. cite.