DJVU PDF Pinnow, H.-J. 1979, "Remarks on the structure of the Khmer syllable and word", in The Mon-Khmer Studies Journal, vol. 8, pp. 131-137. cite.

DJVU PDF Theraphan L. Thongkum. 1979, "The distribution of the sounds of Bruu", in The Mon-Khmer Studies Journal, vol. 8, pp. 221-293. cite.