TY JOUR TI MODELING OF FILTRATION IN A HETEROGENEOUS POROUS MEDIUM KW JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Galaguz, Y.P. AU Safina, G.L. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov