X. . Sika, D. . Kisbianty, M. . Istoningtyas, D. Z. . Abidin, and A. N. . Toscany, “Optimized RoBERTa–DeBERTa Ensemble for Multi-Class Sentiment Analysis on Highly Imbalanced Data ”, J. Tek. Inform. (JUTIF), vol. 7, no. 2, pp. 1964–1980, Apr. 2026.