DJVU PDF Jarkey, N. 1987, "An investigation of two alveolar stop consonants in White Hmong", in Linguistics of the Tibeto-Burman Area, vol. 10, no. 2, pp. 57-70. cite.
DJVU PDF Ratliff, M. 1987, "Tone sandhi compounding in White Hmong", in Linguistics of the Tibeto-Burman Area, vol. 10, no. 2, pp. 71-105. cite.