DJVU PDF Jacob, J.M. 1993, "Notes on the numerals and numeral coefficients on Old, Middle, and Modern Khmer", in Cambodian Linguistics, Literature and History, ed. D.A. Smyth, pp. 27-43. School of Oriental and African Studies, University of London. cite.

DJVU PDF Jacob, J.M. 1993, "Affixation in Middle Khmer with Old and Modern comparisons", in Cambodian Linguistics, Literature and History, ed. D.A. Smyth, pp. 64-86. School of Oriental and African Studies, University of London. cite.