1. Arthur, D., Vassilvitskii, S.: k-means++: the advantages of careful seeding. In: Eighteenth ACM-SIAM Symposium on Discrete Algorithms, pp. 1027–1035 (2007)
2. Chen, M.Y., Hauptmann, A.: MoSIFT: recognizing human actions in surveillance videos. Ann. Pharmacother. 39(1), 150–152 (2009)
3. Dempster, A.P.: Maximum likelihood estimation from incomplete data via the EM algorithm. J. R. Stat. Soc. 39(1), 1–38 (1977)
4. Fan, R.E., Chang, K.W., Hsieh, C.J., Wang, X.R., Lin, C.J.: Liblinear: a library for large linear classification. J. Mach. Learn. Res. 9(9), 1871–1874 (2008)
5. Hassner, T., Itcher, Y., Kliper-Gross, O.: Violent flows: real-time detection of violent crowd behavior. In: IEEE Conference on Computer Vision and Pattern Recognition Workshops, pp. 1–6 (2012)