A. NOWICKI and J. REID, “An ultrasonic method for the investigation of coronary graft patency”, Arch. Acoust., vol. 8, no. 3, pp. 223–234, Mar. 2016, Accessed: Apr. 26, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3256