Moutari, Natatou Dodo, Abba Mallam Hassane, Barro Diakarya, and Saley Bisso. 2021. “The ARMA-APARCH-EVT Models Based on HAC in Dependence Modeling and Risk Assessment of a Financial Portfolio”. European Journal of Pure and Applied Mathematics 14 (4):1467-89. https://doi.org/10.29020/nybg.ejpam.v14i4.4114.