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\bibitem{623} Jordi Gonzalez, Javier Varona, Xavier Roca, \& Juan J. Villanueva. (2005). A Comparison Framework for Walking Performances using aSpaces. \textit{Electronic Letters on Computer Vision and Image Analysis, Special Issue on articulated Motion,  5(3):105{\textendash}116  (Electronic Letters: IF: 1.016)}.

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