@article{AA_2003_15_3_a1,
     author = {D. E. Apushkinskaya and N. N. Ural'tseva and H. Shahgholian},
     title = {On the {Lipschitz} property of the free boundary in a~parabolic problem with obstacle},
     journal = {Algebra i analiz},
     pages = {78--103},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2003_15_3_a1/}
}