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3C Empresa. Investigación y pensamiento crítico. ISSN: 2254-3376 Ed. 43 Vol. 9 N.º 3 Agosto - Noviembre
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https://doi.org/10.17993/3cemp.2020.090343.97-107
Iri = The unied index of i one month after recovery
Ioi = The unied index of i per month of the reference value
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