@article{DE_1997_33_3_a16,
     author = {I. B. Badriev and O. V. Pankratova and R. R. Shagidullin},
     title = {Iterative methods for solving filtration problems with a discontinuous law with a limit gradient},
     journal = {Differencialʹnye uravneni\^a},
     pages = {396--399},
     publisher = {mathdoc},
     volume = {33},
     number = {3},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_3_a16/}
}