GONCHARSKY, A.; ROMANOV, S.; SERYOZHNIKOV, S. Low-frequency 3D ultrasound tomography: dual-frequency method. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie), [S. l.], v. 19, n. 58, p. 479–495, 2018. DOI: 10.26089/NumMet.v19r443. Disponível em: https://en.num-meth.ru/index.php/journal/article/view/990. Acesso em: 28 apr. 2024.