@article{DAN_1988_299_1_a12,
     author = {E. V. Radkevich},
     title = {Solvability of contact problems with a free boundary},
     journal = {Doklady Akademii Nauk},
     pages = {58--62},
     publisher = {mathdoc},
     volume = {299},
     number = {1},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_299_1_a12/}
}