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1Article of investigationPublished in 2012Repositorio Repositorio UdeA
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2Article of journalPublished in 2013Repositorio Repositorio UDEM
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3BookPublished in 2005Repositorio Universidad Nacional de Colombia
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4Work documentPublished in 1999Repositorio Universidad Nacional de Colombia
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5Doctoral thesisPublished in 2012Repositorio Universidad Nacional de Colombia
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6Work documentPublished in 2003Repositorio Universidad Nacional de Colombia
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