STASZEWSKI, Wiktor, Tadeusz GUDRA, and Krzysztof J. OPIELINSKI. “Application of the Ultrasonic Ring Array Used in UTT for the Reflection Method Examinations of Structures”. Archives of Acoustics 46, no. 3 (September 30, 2021): 427–434. Accessed February 26, 2026. https://acoustics.ippt.pan.pl/index.php/aa/article/view/2948.