@article{DAN_1980_251_6_a7,
     author = {A. D. Yurii},
     title = {On an optimal problem of {Stefan} type},
     journal = {Doklady Akademii Nauk},
     pages = {1317--1321},
     publisher = {mathdoc},
     volume = {251},
     number = {6},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_251_6_a7/}
}