Analysis of Colombian market volatility in the covid-19 scenario: a review from the postulates of fractal geometry and econometric models. Rev.esc.adm.neg [Internet]. 2023 Sep. 10 [cited 2026 Oct. 2];(94). Available from: https://ojs-ean-pruebas.metarevistas.org/index.php/Revista/article/view/3750