Validation-Based Hyperparameter Optimization of a Hybrid IndoBERT-BiGRU Model for Indonesian Sentiment Analysis. Jurnal Teknoif Teknik Informatika Institut Teknologi Padang [Internet]. 2026 Oct. 31 [cited 2026 Oct. 30];14(2):139-48. Available from: https://teknoif.itp.ac.id/index.php/teknoif/article/view/969