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1Article of journalPublished in 2014Repositorio Universidad Nacional de Colombia
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2Article of investigationPor Ospina Vélez, Daniel; Ciro Galeano, Johana Andrea; Román Ochoa, Yony; Peláez Jaramillo, Carlos Alberto; López Herrera, Albeiro; Parra Suescun, JaimePublished in 2011Repositorio Repositorio UdeA
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