1. Acosta-Mendoza, N., Gago-Alonso, A., Medina-Pagola, J.E.: Frequent approximate subgraphs as features for graph-based image classification. Knowledge-Based Systems 27, 381–392 (2012)
2. Chakraborty, B., Holte, M.B., Moeslund, T.B., Gonzàlez, J.: Selective spatio-temporal interest points. Computer Vision and Image Understanding 116(3), 396–410 (2012)
3. Chen, M.Y., Hauptmann, A.: Mosift: Recognizing human actions in surveillance videos. Research Showcase 929, Carnegie Mellon University. School of Computer Science. Computer Science Department (2009)
4. Cózar, J.R., Hernández, R., Heredia, Y., González-Linares, J.M., Guil, N.: Reducing Vocabulary Size in Human Action Classification. In: Frontiers in Artificial Intelligence and Applications, vol. 243, pp. 1712–1719. IOS Press (2012)
5. Duda, R.O., Hart, P.E., Stork, D.G.: Pattern Classification, 2nd edn. Wiley Interscience (2001)