Chengbo Dong, Guodong Wang, Xuan Zhang, Beixing Deng, Jia Liu, Xing Li. Two-layer network coordinate system for Internet distance prediction. In Proceedings of the International Conference on Ultra Modern Telecommunications, ICUMT 2009, 12-14 October 2009, St. Petersburg, Russia. pages 1-6, IEEE, 2009. [doi]