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\bibitem{1022} X. Varona, Antoni Jaume-i-Capo, Jordi Gonzalez, \& Francisco Jose Perales. (2008). Toward Natural Interaction through Visual Recognition of Body Gestures in Real-Time. \textit{Interacting with Computers, diu 10,1016/j.intcom.2008.10.001, available on line}.

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