Jahanian, Fahime, Mohammadi, Ahmad, paytakhti oskooe, seyyed ali, Mottaghi, Aliasghar. “Portfolio optimization using gray wolf algorithm and modified Markowitz model based on CO-GARCH modeling.” Advances in Mathematical Finance and Applications, vol. 9, no. 1, 2023, pp. 305-319. 10.22034/amfa.2022.1966381.1787