@article{DAN_1964_157_1_a10,
     author = {L. D. Kudryavtsev},
     title = {A variational method for unbounded regions},
     journal = {Doklady Akademii Nauk},
     pages = {45--48},
     publisher = {mathdoc},
     volume = {157},
     number = {1},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_157_1_a10/}
}