Prasetio, B. H., L. O. A. Hazmar, D. Syauqy, and E. R. Widasari. “Gammatone-Frequency Cepstral Coefficients Based Fear Emotion Level Recognition System”. Revista Mexicana De Ingenieria Biomedica, vol. 45, no. 2, May 2024, pp. 6-22, doi:10.17488/RMIB.45.2.1.