@article{DAN_1992_324_4_a5,
     author = {E. V. Radkevich},
     title = {The dynamic angle problem for the {Verigin--Muskat} problem},
     journal = {Doklady Akademii Nauk},
     pages = {746--750},
     publisher = {mathdoc},
     volume = {324},
     number = {4},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_324_4_a5/}
}