OPIELIŃSKI, Krzysztof J., Tadeusz GUDRA, and Piotr PRUCHNICKI. “Narrow Beam Ultrasonic Transducer Matrix Model for Projection Imaging of Biological Media”. Archives of Acoustics 35, no. 1 (November 11, 2013): 91–109. Accessed January 17, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/259.