K. J. OPIELIŃSKI, “Analysis and Modelling of Ultrasonic Pulses in a Biological Medium”, Arch. Acoust., vol. 33, no. 4(S), pp. 13–19, Dec. 2008, Accessed: Apr. 25, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/829