M. PIECHOCKI, “Bi-directional continuous wave doppler flowmeter and its application in investigations of disturbed blood flows”, Arch. Acoust., vol. 11, no. 1, pp. 75–88, Jul. 2015, Accessed: Apr. 26, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3110