Journal ArticleMining Spatio-temporal Reachable Regions With Multiple Sources over Massive Trajectory DataDing, Yichen; Zhou, Xun; Wu, Guojun; Li, Yanhua; Bao, Jie; Zheng, Yu; Luo, Jun2019-12-1810172785IEEE Transactions on Knowledge and Data Engineering1 to 11041-4347https://doi.org/10.1109/TKDE.2019.29595311657350; 1831140National Science Foundation