@article{DAN_1968_178_5_a12,
     author = {S. N. Kruzhkov},
     title = {A class of problems with an unknown boundary for the heat conduction equation},
     journal = {Doklady Akademii Nauk},
     pages = {1036--1038},
     publisher = {mathdoc},
     volume = {178},
     number = {5},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_178_5_a12/}
}