DJVU PDF Sun, J.T. 1994, "Caodeng rGyalrong phonology: a first look", in Linguistics of the Tibeto-Burman Area, vol. 17, no. 2, pp. 29-47. cite.

DJVU PDF Duanmu, S. 1994, "The phonology of the glottal stop in Garo", in Linguistics of the Tibeto-Burman Area, vol. 17, no. 2, pp. 69-82. cite.