R. S. . A. Corpuz, “Categorizing Natural Language-Based Customer Satisfaction: An Implementation Method Using Support Vector Machine and Long Short-Term Memory Neural Network”, IJIE, vol. 13, no. 4, pp. 77–91, Apr. 2021, Accessed: Aug. 07, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/ijie/article/view/7334