@article{DAN_1980_253_3_a0,
     author = {S. A. Gabov},
     title = {On the spectrum of a problem of {S.\,L.~Sobolev}},
     journal = {Doklady Akademii Nauk},
     pages = {521--524},
     publisher = {mathdoc},
     volume = {253},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_253_3_a0/}
}