TY - JOUR AU - A. V. Goncharsky AU - S. Y. Romanov AU - S. Yu. Seryozhnikov TI - Low-frequency 3D ultrasound tomography: dual-frequency method JO - Numerical methods and programming PY - 2018 SP - 479 EP - 495 VL - 19 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMP_2018_19_4_a14/ LA - ru ID - VMP_2018_19_4_a14 ER -