@article{RM_1980_35_1_a13,
     author = {E. V. Radkevich},
     title = {On the filtration problem in a~porous non-homogeneous non-isotropic medium},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {229--230},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1980_35_1_a13/}
}