Doaei, Meysam, Mirzaei, Seyed Ahmad, Rafigh, Mohammad. “Hybrid Multilayer Perceptron Neural Network with Grey Wolf Optimization for Predicting Stock Market Index.” Advances in Mathematical Finance and Applications, vol. 6, no. 4, 2021, pp. 883-894. 10.22034/amfa.2021.1903474.1452