Huy, Ngô Hoàng. “On Combining F0 Contour and Vocal Tract Length Normalisation for Speech Recognition of Vietnamese Proper Names”. <i>Journal of Computer Science and Cybernetics</i> 27, no. 3 (April 26, 2012): 275–282. Accessed November 3, 2025. https://jcc.vast.vn/jcc/article/view/491.