Ly Kha, Nguyen. “KHI AND LUC IN MODERN VIETNAMESE”. VNUHCM Journal of Science and Technology Development 2, no. 6&7 (July 31, 1999): 121-126. Accessed August 31, 2025. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/3659.