WASZCZUK T, KUJAWSKA T, SOMER JC. Focusing of an ultrasonic beam by means of a piezoelectric annular array. Arch. Acoust. [Internet]. 2016 Mar. 7 [cited 2025 Apr. 26];8(3):185-204. Available from: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3255