LIAN, Y. E. Deep Learning on SPY Stock Prices Using Improved Multi-Step LSTM. International Journal of Finance Research, [S. l.], v. 3, n. 2, p. 135 - 146, 2022. DOI: 10.47747/ijfr.v3i2.785. Disponível em: https://www.journal.jis-institute.org/index.php/ijfr/article/view/785. Acesso em: 7 oct. 2026.