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1Work documentPublished in 1998Repositorio Universidad Nacional de Colombia
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2Article of journalPublished in 2005Repositorio Universidad Nacional de Colombia
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3Article of journalPublished in 2005Repositorio Universidad Nacional de Colombia
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4Article of journalPublished in 2012Repositorio Universidad Nacional de Colombia
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5Work documentPublished in 2001Repositorio Universidad Nacional de Colombia
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6Work documentPublished in 1993Repositorio Universidad Nacional de Colombia
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7Work documentPublished in 2011Repositorio Universidad Nacional de Colombia
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