HANIAS, M.; MAGAFAS, L. Non Linear Analysis of S&P Index. Equilibrium. Equilibrium. Quarterly Journal of Economics and Economic Policy, [S. l.], v. 8, n. 4, p. 125–135, 2014. DOI: 10.12775/EQUIL.2013.030. Disponível em: https://apcz.umk.pl/EQUIL/article/view/EQUIL.2013.030. Acesso em: 1 sep. 2024.