@article{VMP_2018_19_4_a14,
     author = {A. V. Goncharsky and S. Y. Romanov and S. Yu. Seryozhnikov},
     title = {Low-frequency {3D} ultrasound tomography: dual-frequency method},
     journal = {Numerical methods and programming},
     pages = {479--495},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMP_2018_19_4_a14/}
}