DJVU PDF Bielenberg, B. and Zhalie, N. 2001, "Chokri (Phek dialect): phonetics and phonology", in Linguistics of the Tibeto-Burman Area, vol. 24, no. 2, pp. 85-122. cite.

DJVU PDF Dempsey, J. 2001, "Remarks on the vowel system of old Burmese", in Linguistics of the Tibeto-Burman Area, vol. 24, no. 2, pp. 205-234. cite.