PUIDOKAS, V.; MARCINKEVICIUS, A. J. Structure and Features of Sigma-Delta Modulators. Elektronika ir Elektrotechnika, [S. l.], v. 84, n. 4, p. 39-42, 2008. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/11124. Acesso em: 2 oct. 2022.