Opieliński, Krzysztof, and Tadeusz Gudra. “Determining the Acoustic Field Distribution of Ultrasonic Multi-Element Probes”. Archives of Acoustics 31, no. 4(S) (January 31, 2006): 391–396. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/1372.