DJVU PDF Abramson, A.S. and Erickson, D.M. 1992, "Tone splits and voicing shifts in Thai: phonetic plausibility", in The Third International Symposium on Language and Linguistics, Bangkok, Thailand, pp. 1-15. Chulalongkorn University. cite.

DJVU PDF Erickson, D. 1975, "Phonetic implications for an historical account of tonogenesis in Thai", in Studies in Tai Linguistics in Honor of William J. Gedney, ed. J.G. Harris and J.R. Chamberlain, pp. 100-111. Central Institute of English Language. cite.