DUMBRAVA, V.; SVILAINIS, L. Noise Model for Ultrasonics Transducer Preamplifier. Elektronika ir Elektrotechnika, [S. l.], v. 66, n. 2, p. 26–30, 2006. DOI: 10.5755/j02.eie.10587. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/10587.. Acesso em: 11 jun. 2026.