TY JOUR TI Numerical Solution of a Two-Dimensional Problem of Determining the Propagation Velocity of Seismic Waves in Inhomogeneous Medium of Memory Type KW mathematical modeling KW inhomogenious geological medium of memory type KW velocity of seismic waves propogation JO Russian Journal of Earth Sciences AU Tomaev, M.R. AU Totieva, Z.D. PY 2023 IS 23 PB Geophysical Center of the Russian Academy of Sciences