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281Article of journalPor Yemail Cortés, Antonio Ernesto; Pontificia Universidad Javeriana, Bogotá - Colombia; Beltrán Vega, Felipe; Pontificia Universidad Javeriana, Bogotá - ColombiaPublished in 2006Repositorio Repositorio Universidad Javeriana
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282Published in 2012Repositorio RiUPTC: Repositorio Institucional UPTC
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290Published in 2013Repositorio RiUPTC: Repositorio Institucional UPTC
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