Verpakhovskaya, A., V. Pilipenko, and V. Budkevich. “3D Finite-Difference Migration of the Field of Refracted Waves”. Geofizicheskiy Zhurnal, vol. 37, no. 3, June 2015, pp. 50-65, doi:10.24028/gzh.0203-3100.v37i3.2015.111102.