DJVU PDF Edmondson, J.A and Gregerson, K. 1996, "Bolyu tone in Vietic perspective", in The Mon-Khmer Studies Journal, vol. 26, pp. 117-133. cite.

DJVU PDF Edmondson, J.A. 1995, "English-Bolyu glossary", in The Mon-Khmer Studies Journal, vol. 24, pp. 133-159. cite.