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1Article of journalPublished in 2009Repositorio Repositorio Institucional UPN
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2Article of journalPublished in 2010Repositorio Repositorio Institucional UPN
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3Article of journalPublished in 2010Repositorio Repositorio Institucional UPN
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4Article of journalPublished in 2006Repositorio Repositorio Institucional UPN
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5Article of journalPublished in 2002Repositorio Repositorio Institucional UPN
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6Article of journalPor Urbina Duarte, Sulma; Gallego Badillo, Rómulo; Pérez Miranda, Royman; Gallego Torres, Adriana PatriciaPublished in 2008Repositorio Repositorio Institucional UPN
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7Article of journalPublished in 2009Repositorio Repositorio Institucional UPN
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8Article of journalPublished in 2005Repositorio Repositorio Institucional UPN
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9Article of journalPor Gallego Badillo, Rómulo; Pérez Miranda, Royman; Torres de Gallego, Luz Nery; Mantilla Mantilla, María NellyPublished in 2001Repositorio Repositorio Institucional UPN
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10Article of journalPublished in 2008Repositorio Repositorio Institucional UPN
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