DR. N. RAMAMURTHY, K. G. Optimized Approach for Authentication In Audio Signal By Wavelet Packets Transformation Technique. International Journal of Engineering and Computer Science, india, v. 4, n. 09, 2015. Disponível em: http://ijecs.in/index.php/ijecs/article/view/3128. Acesso em: 6 may. 2024.