Thanh Nhan, Ngo, and Phan Gia Anh Thu. “A Contribution to Teaching Vietnamese Music: Key Pitches in Context and the Pitch Intensity Contour Graph”. Tạp chí Khoa học Xã hội và Nhân văn (VNU Journal of Social Sciences and Humanities) 3, no. 5 (October 26, 2025): 573–585. Accessed December 30, 2025. https://jossh.ussh.edu.vn/index.php/JOSSH-VN/article/view/357.