@article{VMP_2015_16_4_a1,
     author = {A. V. Goncharsky and S. Y. Romanov},
     title = {Iterative methods for solving inverse problems of ultrasonic tomography},
     journal = {Numerical methods and programming},
     pages = {464--475},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMP_2015_16_4_a1/}
}