A. NOWICKI, J. M. REID, and M. P. SPENCER, “Ultrasonic Doppler MTI system for evaluation of aortocoronary bypass graft patency”, Arch. Acoust., vol. 9, no. 1-2, pp. 243–250, Jul. 2015, Accessed: Jun. 15, 2025. [Online]. Available: https://acoustics.ippt.pan.pl/index.php/aa/article/view/3220