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1Article of journalPor Páramo, PabloPublished in 1991Repositorio Repositorio Institucional UPN
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2Article of journalPublished in 2012Repositorio Repositorio Institucional UPN
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3Article of journalPublished in 2013Repositorio Universidad Nacional de Colombia
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4Article of journalPublished in 2000Repositorio Universidad Nacional de Colombia
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5Article of journalPublished in 2002Repositorio Universidad Nacional de Colombia
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6Article of journalPublished in 2019Repositorio Repositorio Institucional U. Caldas
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9Article of journalPor Riaño-Garzón, Manuel; Raynaud Prado, Nathalie Claire; Albornoz Arias, Neida; Mazuera-Arias, RinaPublished in 2018Repositorio Repositorio Digital UFPS
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