@article{DAN_1992_326_3_a8,
     author = {S. I. Shmarev},
     title = {Properties of free boundaries for a class of degenerate parabolic},
     journal = {Doklady Akademii Nauk},
     pages = {431--435},
     publisher = {mathdoc},
     volume = {326},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_326_3_a8/}
}