DJVU PDF Vickery, M. 1992, "A ‘modern’ number term in Old Khmer", in The Mon-Khmer Studies Journal, vol. 21, pp. 191-193. cite.

DJVU PDF Bauer, C. 1992, "OKhm. ‘w-, ‘y-, ‘N-", in The Mon-Khmer Studies Journal, vol. 21, pp. 194-198. cite.