Siew Yin, C., L. Teck Chaw, and M. Yaacob. “Hop-by-Hop QoS Routing Using Statistical Distribution-Free Approach”. Malaysian Journal of Computer Science, vol. 18, no. 2, Dec. 2005, pp. 28-37, https://sare.um.edu.my/index.php/MJCS/article/view/6239.