Hong Lien, Pham, and Nguyen Nhat Vien. “CONSTRAINT-BASED ROUTING IN MPLS”. VNUHCM Journal of Science and Technology Development 7, no. 8 (August 31, 2004): 58-64. Accessed September 22, 2025. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/3244.