FILIPCZYŃSKI, L.; NOWICKI, A.; CHROŚCICKI, A. Application of the stationary echo cancellation technique (SEC) in ultrasonic doppler measurements of blood flow in children’s hearts. Archives of Acoustics, [S. l.], v. 7, n. 3-4, p. 247–252, 2016. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3285. Acesso em: 26 apr. 2025.