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\bibitem{46} A. Martinez, S. Gonzalez, Jordi Vitria, \& J. Lopez. (1997). NAT: a robot that recognizes offices. In \textit{Proceedings of CAEPIA{\textendash}97. VII Conferencia de la Asociaci{\'o}n Espa{\~n}ola para la Inteligencia Artificial.} (pp. 327--336).

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