FILIPCZYŃSKI, Leszek; SAŁKOWSKI, Jan. Attempts at the ultrasonic visualization of the heart in real time. Archives of Acoustics, [S. l.], v. 2, n. 3, p. 225–230, 2016. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3486. Acesso em: 26 apr. 2025.