%0 Journal Article %A S. N. Kruzhkov %T A class of problems with an unknown boundary for the heat conduction equation %J Doklady Akademii Nauk %D 1968 %P 1036-1038 %V 178 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1968_178_5_a12/ %G ru %F DAN_1968_178_5_a12