BOATENG , E.; ASAFO-ADJEI, E.; GATSI, J. G.; GHERGHINA, Ştefan C. .; SIMIONESCU, L. N. Multifrequency-based non-linear approach to analyzing implied volatility transmission across global financial markets. Oeconomia Copernicana, [S. l.], v. 13, n. 3, p. 699–743, 2022. DOI: 10.24136/oc.2022.021. Disponível em: http://economic-research.pl/Journals/index.php/oc/article/view/2077. Acesso em: 4 dec. 2022.