Besic, Nikola Zernike ultrasonic tomography for fluid velocity imaging based on pipeline intrusive time-of-flight measurements. [electronic resource] - IEEE transactions on ultrasonics, ferroelectrics, and frequency control Nov 2014 - 1846-55 p. digital Publication Type: Journal Article ISSN: 1525-8955 Standard No.: 10.1109/TUFFC.2014.006515 doi