Nowicki, A., W. Secomski, P. Karłowicz, and G. Łypacewicz. “High-Frequency Doppler Ultrasound Flowmeter”. Archives of Acoustics 19, no. 4 (May 1, 2014): 435–449. Accessed January 13, 2025. https://acoustics3.ippt.pan.pl/index.php/aa/article/view/1110.