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1Article of journalPublished in 2017Repositorio Repositorio Institucional UPN
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2Article of journalPublished in 2017Repositorio Repositorio Institucional UPN
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3Article of journalPublished in 2018Repositorio Repositorio Institucional UPN
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4Trabajo de grado de pregradoPublished in 2014Repositorio Repositorio Institucional UPN