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1http://purl.org/coar/resource_type/c_26e4Published in 2011Repositorio Repositorio UdeA
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2http://purl.org/coar/resource_type/c_26e4Published in 2005Repositorio Repositorio UdeA
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3http://purl.org/coar/resource_type/c_26e4Published in 2006Repositorio Repositorio UdeA
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4http://purl.org/coar/resource_type/c_26e4Published in 2012Repositorio Repositorio UdeA