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661
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664
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668Article of journalPublished in 2009Repositorio Repositorio Institucional UPN
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669Article of journalPublished in 2017Repositorio Repositorio Institucional UPN
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670http://purl.org/coar/version/c_b1a7d7d4d402bccePublished in 2010Repositorio Repositorio UIS
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671
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673
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674Article of journalPor González-Álvarez, Álvaro; Viloria-Marimon, Orlando M.; Coronado-Hernández, Oscar E.; Vélez-Pereira, Andrés M.; Tesfagiorgis, Kibrewossen; Coronado-Hernandez, Jairo R.; Coronado Hernández, Oscar E.Published in 2019Repositorio REDICUC - Repositorio CUC
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675Article of journalPublished in 1956Repositorio Universidad Nacional de Colombia
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676
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677Published in 2017Repositorio Repositorio Corporación Universitaria Americana
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680