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1Article of journalPor Fajardo, SergioPublished in 1987Repositorio Universidad Nacional de Colombia
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2Article of journalPublished in 1985Repositorio Universidad Nacional de Colombia
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4Article of journalPublished in 2016Repositorio Universidad Nacional de Colombia
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5Trabajo de grado de pregradoPublished in 2011Repositorio Séneca: repositorio Uniandes
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6Published in 2007Repositorio Repositorio EdocUR - U. Rosario
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7Published in 2020Repositorio Repositorio Digital USB
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8Article of journalPublished in 2017Repositorio Biblioteca Digital Universidad Externado de Colombia
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9Published in 2018Repositorio Repositorio Institucional ECI
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10Article of journalPublished in 2017Repositorio Biblioteca Digital Universidad Externado de Colombia
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11http://purl.org/coar/version/c_b1a7d7d4d402bccePublished in 2006Repositorio Repositorio UIS
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12Article of investigationPublished in 2009Repositorio Repositorio UdeA
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13Article of journalPublished in 2017Repositorio Biblioteca Digital Universidad Externado de Colombia
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14Article of journalPor Salazar, Juan Carlos; Palomino, René Iral; Calvo, Enrique; Rojas, Adriana; Hincapié, María Eugenia; Anaya, Juan Manuel; Díaz, Francisco JavierPublished in 2007Repositorio Universidad Nacional de Colombia
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15Published in 2017Repositorio Repositorio EAFIT
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16Article of journalPublished in 1998Repositorio Universidad Nacional de Colombia
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17Published in 2006Repositorio Repositorio EdocUR - U. Rosario
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18Article of journalPublished in 2013Repositorio RED: Repositorio Educativo Digital UAO
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20http://purl.org/coar/version/c_b1a7d7d4d402bccePublished in 2008Repositorio Repositorio UIS
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