Z. Yang, C. Wu, and Y. Liu. Proceedings of the 18th Annual International Conference on Mobile Computing and Networking, page 269--280. New York, NY, USA, ACM, (2012)
M. Alzantot, and M. Youssef. Proceedings of the 20th International Conference on Advances in Geographic Information Systems, page 99--108. New York, NY, USA, ACM, (2012)
R. Gao, M. Zhao, T. Ye, F. Ye, Y. Wang, K. Bian, T. Wang, and X. Li. Proceedings of the 20th Annual International Conference on Mobile Computing and Networking, page 249--260. New York, NY, USA, ACM, (2014)
P. Newson, and J. Krumm. Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, page 336--343. New York, NY, USA, ACM, (2009)
A. Gorban, and A. Zinovyev. Principal Manifolds for Data Visualization and Dimension Reduction, volume 58 of Lecture Notes in Computational Science and Enginee, Springer Berlin Heidelberg, (2008)
H. Liu, Y. Gan, J. Yang, S. Sidhom, Y. Wang, Y. Chen, and F. Ye. Proceedings of the 18th Annual International Conference on Mobile Computing and Networking, page 305--316. New York, NY, USA, ACM, (2012)