SVILAINIS, L.; CHAZIACHMETOVAS, A.; GOMEZ ALVAREZ-ARENAS, T. E. Ultrasonic Air Coupled Transducer Output Impedance Measurement Technique. Elektronika ir Elektrotechnika, [S. l.], v. 25, n. 1, p. 18-25, 2019. DOI: 10.5755/j01.eie.25.1.22731. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/22731. Acesso em: 24 sep. 2020.