Phuong, Nguyen Tien, and Dang Van Duc. “DO-TPR*-Tree: A Density Optimal Method for TPR*-Tree”. Journal of Computer Science and Cybernetics 31, no. 1 (March 16, 2015): 43–53. Accessed December 5, 2025. https://vjs.ac.vn/jcc/article/view/4630.