Лютак, І. З., А. О. Бедзір, З. П. Лютак, and А. А. Мандра. 2012. “Mathematical Model of Distribution of Ultrasonic Waves Directed into the Pipeline With Welded Joints”. METHODS AND DEVICES OF QUALITY CONTROL, no. 1(28) (March):41-51. https://mpky.nung.edu.ua/index.php/mpky/article/view/8.