DUMBRAVA, V.; SVILAINIS, L. Noise Model for Ultrasonics Transducer Preamplifier. Elektronika ir Elektrotechnika, [S. l.], v. 66, n. 2, p. 26-30, 2006. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/10587. Acesso em: 4 oct. 2022.