@article{AA_2000_12_6_a1,
     author = {G. I. Bizhanova and V. A. Solonnikov},
     title = {On problems with free boundaries for second-order parabolic equations},
     journal = {Algebra i analiz},
     pages = {98--139},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2000_12_6_a1/}
}