MAMIROV, T. Estimation of Frequency Characteristics of Super-Narrow Band Digital Filters. Elektronika ir Elektrotechnika, [S. l.], v. 77, n. 5, p. 69-72, 2007. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/10744. Acesso em: 29 sep. 2020.