DJVU PDF Haudricourt, A.G. 1979, "Le traitment des spirantes lors de la mutation des initiales", in Studies in Tai and Mon-Khmer Phonetics and Phonology In Honour of Eugénie J.A. Henderson, ed. T.L. Thongkum et al., pp. 106-110. Chulalongkorn University Press. cite.