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1http://purl.org/coar/resource_type/c_c94fPublished in 2000Repositorio Universidad Nacional de Colombia
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2http://purl.org/coar/resource_type/c_c94fPublished in 2000Repositorio Universidad Nacional de Colombia
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3Article of journalPublished in 1994Repositorio Universidad Nacional de Colombia
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4http://purl.org/coar/resource_type/c_c94fPublished in 2000Repositorio Universidad Nacional de Colombia
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5http://purl.org/coar/resource_type/c_c94fPublished in 2000Repositorio Universidad Nacional de Colombia
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6Article of journalPor Mesa Sánchez, Óscar José; Smith Quintero, Ricardo Agustín; Salazar Velásquez, José Enrique; Carvajal Serna, Luis FernandoPublished in 1995Repositorio Universidad Nacional de Colombia
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7Article of journalPublished in 1995Repositorio Universidad Nacional de Colombia
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8Article of journalPublished in 2001Repositorio Universidad Nacional de Colombia
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9http://purl.org/coar/resource_type/c_c94fPublished in 2000Repositorio Universidad Nacional de Colombia
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10Article of journalPublished in 1997Repositorio Universidad Nacional de Colombia
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11Article of journalPublished in 1991Repositorio Universidad Nacional de Colombia
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12http://purl.org/coar/resource_type/c_c94fPublished in 2004Repositorio Universidad Nacional de Colombia
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13Article of journalPublished in 2001Repositorio Universidad Nacional de Colombia
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14http://purl.org/coar/resource_type/c_c94fPublished in 2004Repositorio Universidad Nacional de Colombia
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15http://purl.org/coar/resource_type/c_c94fPublished in 2002Repositorio Universidad Nacional de Colombia
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16http://purl.org/coar/resource_type/c_c94fPublished in 2002Repositorio Universidad Nacional de Colombia
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17Article of journalPublished in 2001Repositorio Universidad Nacional de Colombia
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18Article of journalPublished in 1993Repositorio Universidad Nacional de Colombia
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19Article of journalPublished in 1991Repositorio Universidad Nacional de Colombia
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20http://purl.org/coar/resource_type/c_c94fPublished in 2004Repositorio Universidad Nacional de Colombia
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