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21Article of journalPublished in 2013Repositorio Universidad Nacional de Colombia
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24Article of journalPublished in 2012Repositorio Universidad Nacional de Colombia
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25Article of journalPor Vargas, CarlosPublished in 2012Repositorio Universidad Nacional de Colombia
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26Article of journalPublished in 2000Repositorio Universidad Nacional de Colombia
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29Article of journalPublished in 2013Repositorio Universidad Nacional de Colombia
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30Article of journalPublished in 2011Repositorio Universidad Nacional de Colombia
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31Article of journalPublished in 1995Repositorio Universidad Nacional de Colombia
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32Article of journalPublished in 2016Repositorio Universidad Nacional de Colombia
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33Article of journalPublished in 2012Repositorio Universidad Nacional de Colombia
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34Article of journalPublished in 2017Repositorio Universidad Nacional de Colombia
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35Article of journalPublished in 1995Repositorio Universidad Nacional de Colombia
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36Article of journalPor Ramírez Soto, Antonio; Gaitán Duarte, Hernando; Bolívar Salamanca, Zully; Rubiano Caballero, Alfredo; Forero, Enrique; Nieva Reyes, Blanca C.; Escobar Jácome, Elsa; Meza Azuero, José Gregorio; Franco Zuloaga, Jorge Andrés; Agudelo Yepes, Marha CeciliaPublished in 1998Repositorio Universidad Nacional de Colombia
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37Article of journalPublished in 2001Repositorio Universidad Nacional de Colombia
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38Article of journalPublished in 2014Repositorio Universidad Nacional de Colombia
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39Article of journalPublished in 1993Repositorio Universidad Nacional de Colombia
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40Article of journalPor Revista, ReistaPublished in 2011Repositorio Universidad Nacional de Colombia
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