DJVU PDF Che, Q. 1992, "A preliminary discussion of subject marking (byed-sgra) in Lhasa Tibetan", in Linguistics of the Tibeto-Burman Area, vol. 15, no. 1, pp. 53-63. cite.
DJVU PDF Che, Q. 1991, "On certain Tibetan and Chinese phonological questions of the medieval period", in Linguistics of the Tibeto-Burman Area, vol. 14, no. 2, pp. 65-92. cite.
DJVU PDF Che, Q. 1990, "Certain phonetic changes in Tibetan in the light of variant and erroneous spellings in Old Tibetan documents of the royal period", in Linguistics of the Tibeto-Burman Area, vol. 13, no. 1, pp. 79-88. cite.