SUMMART, S.; THONGSOPA, C. Four phase current-mode sinusoidal quadrature oscillator based on CCCIIs. Engineering and Applied Science Research, [S. l.], v. 40, n. 1, p. 117–123, 2013. Disponível em: https://ph01.tci-thaijo.org/index.php/easr/article/view/8573. Acesso em: 18 may. 2024.