@article{DE_1996_32_7_a12,
     author = {A. D. Lyashko and M. E. Mayorova and M. F. Pavlova},
     title = {On the solvability of a variational inequality in the theory of nonlinear nonstationary filtration},
     journal = {Differencialʹnye uravneni\^a},
     pages = {958--965},
     publisher = {mathdoc},
     volume = {32},
     number = {7},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_7_a12/}
}