I. K. . Dharmendra, I. M. P. P. . Wijaya, I. M. A. W. . Putra, Y. P. . Atmojo, and L. P. S. . Pratiwi, “Classifying Public Complaints in Denpasar: a Comparative Study of CNN, RNN, LSTM, and Stacking Deep Learning Models”, J. Tek. Inform. (JUTIF), vol. 7, no. 1, pp. 411–430, Feb. 2026.