DJVU PDF Saxena, A. 1991, "Pathways of the development of the ergative in Central Tibetan", in Linguistics of the Tibeto-Burman Area, vol. 14, no. 1, pp. 93-108. cite.
DJVU PDF Saxena, A. 1991, "Tone in PaTani and Central Tibetan: parallel developments? and", in Linguistics of the Tibeto-Burman Area, vol. 14, no. 1, pp. 129-136. cite.