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70841Article 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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70842Article of journalPublished in 2013Repositorio Repositorio Institucional UPN
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70843Article of journalPublished in 2004Repositorio Repositorio Institucional UPN
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