DJVU PDF Benedict, P.K. 1979, "Four forays into Karen linguistic history", in Linguistics of the Tibeto-Burman Area, vol. 5, no. 1, pp. 1-35. cite.

DJVU PDF Nagano, Y. 1979, "A historical study of rGyarong rhymes", in Linguistics of the Tibeto-Burman Area, vol. 5, no. 1, pp. 37-47. cite.

DJVU PDF Weidert, A. 1979, "The Sino-Tibetan tonogenetic laryngeal reconstruction theory", in Linguistics of the Tibeto-Burman Area, vol. 5, no. 1, pp. 49-127. cite.