Kacamarga, Fitra, and Kresna Andika Aprianto. “Speech Emotion Recognition through Acoustic Data Augmentation and Attention-Driven CRNN-BiGRU”. Ultimatics : Jurnal Teknik Informatika, vol. 18, no. 1, June 2026, pp. 9-16, doi:10.31937/ti.v18i1.4250.