WASZCZUK, Tomasz; ŁYPACEWICZ, Grażyna; SOMER, Jan. Preliminary ultrasonographic studies on an electronic system for focusing an ultrasonic beam. Archives of Acoustics, [S. l.], v. 14, n. 1-2, p. 111–121, 2015. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3040. Acesso em: 25 apr. 2025.