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- [4] Estimating crowd density with Minkowski fractal dimension ICASSP '99: 1999 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, PROCEEDINGS VOLS I-VI, 1999, : 3521 - 3524
- [5] Estimating crowd density with Minkowski fractal dimension ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 1999, 6 : 3521 - 3524