DJVU PDF Joseph, U.V. and Robbins, B. 2001, "Tone correspondences among the Bodo languages", in Linguistics of the Tibeto-Burman Area, vol. 24, no. 2, pp. 41-55. cite.

DJVU PDF Ding, P.S. 2001, "The pitch-accent system of Niuwozi Prinmi", in Linguistics of the Tibeto-Burman Area, vol. 24, no. 2, pp. 57-83. cite.