DJVU PDF Vuong Toan. 2000, "On the ethnonymes in the Thai linguistic family in Vietnam", in The Fifth International Symposium on Languages and Linguistics, Hochiminh City, pp. 350-353. Vietnam National University, Ho Chi Minh City University of Social Sciences and Humanities. cite.

DJVU PDF Vuong, T. 1996, "Trong nhung huong quan tan hiem nay cua ngon ngu hoc quoc te va khu vuc", in The Fourth International Symposium on Language and Linguistics, Thailand, pp. 2107-2112. Institute of Language and Culture for Rural Development, Mahidol University. cite.

DJVU PDF Toan, V. 1992, "The Tay-Nung language in contact with the Vietnamese", in The Third International Symposium on Language and Linguistics, Bangkok, Thailand, pp. 909-919. Chulalongkorn University. cite.