DJVU PDF Brown, J.M. 1979, "Vowel length in Thai", in Studies in Tai and Mon-Khmer Phonetics and Phonology In Honour of Eugénie J.A. Henderson, ed. T.L. Thongkum et al., pp. 10-25. Chulalongkorn University Press. cite.
DJVU PDF Martin, M.A. 1979, "Les voyells du cambodgien parle' dans la province de Chau Doc (Sud-Vietnam)", in Studies in Tai and Mon-Khmer Phonetics and Phonology In Honour of Eugénie J.A. Henderson, ed. T.L. Thongkum et al., pp. 131-141. Chulalongkorn University Press. cite.