@article{ZNSL_2000_271_a2,
     author = {D. E. Apushkinskaya and H. Shahgholian and N. N. Ural'tseva},
     title = {Boundary estimates for solutions to the parabolic free boundary problem},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {39--55},
     publisher = {mathdoc},
     volume = {271},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_271_a2/}
}