Enhancement of ECG signal by DFT using Fast Fourier Transform (FFT) Algorithm. International Journal of Current Engineering and Technology, [S. l.], v. 5, n. 3, p. 1781–1784, 2015. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/2225. Acesso em: 4 apr. 2026.