W. Chenn and S. F. Chang, Motion trajectory matching of video objects, 2003.

F. Bashir, Object Motion Trajectory-Based Video Database System Indexing, Retrieval , Classification, and Recognition, 2005.

C. Piciarelli, G. L. Foresti, and L. Snidara, Trajectory clustering and its applications for video surveillance, Proceedings IEEE Conference on Advanced Video and Signal Based Surveillance 2005 AVSS-05, pp.40-45, 2005.
DOI : 10.1109/AVSS.2005.1577240

J. W. Hsieh, S. L. Yu, and Y. S. Chen, Motion-Based Video Retrieval by Trajectory Matching, Proc IEEE Trans. on Circuits and Systems for Video Technology, vol.16, issue.3, 2006.

L. Chen, M. T. O¨suo¨su, and V. Oria, Symbolic representation and retrieval of moving object trajectories, Proceedings of the 6th ACM SIGMM international workshop on Multimedia information retrieval , MIR '04, pp.15-16, 2004.
DOI : 10.1145/1026711.1026749