Ismanto, Edi, and Vitriani Vitriani. “RETRACTED: LSTM Network Hyperparameter Optimization for Stock Price Prediction Using the Optuna Framework”. Jurnal Ilmiah Teknik Elektro Komputer Dan Informatika, vol. 9, no. 1, Jan. 2023, pp. 22-35, doi:10.26555/jiteki.v9i1.24944.