ЛЮТАК, І. З. Control of defects in the walls of pipelines by the ultrasonic directed circular waves. METHODS AND DEVICES OF QUALITY CONTROL, [S. l.], n. 2(23), p. 20–24, 2009. Disponível em: https://mpky.nung.edu.ua/index.php/mpky/article/view/299. Acesso em: 20 may. 2024.