SAMAKEE, C.; PASUK, S. Frequency domain identification of volterra model for separating ultraharmonic using the technique of half-frequency of the input signal. Engineering and Applied Science Research, [S. l.], v. 43, p. 60–63, 2016. Disponível em: https://ph01.tci-thaijo.org/index.php/easr/article/view/69693. Acesso em: 18 sep. 2026.