CAlderara, S.; Cucchiara, R.; Prati, A. "Detection of Abnormal Behaviors using a Mixture of Von Mises Distributions" 2007 IEEE Conference on advanced video and signal based surveillance : AVSS 2007, London (UK), pp. 141 -146 , 5-7 September 2007, 2007 DOI: 10.1109/AVSS.2007.4425300

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