@article{DAN_1961_139_4_a6,
     author = {Yu. A. Klokov},
     title = {Boundary-value problems with conditions at $\pm\infty$},
     journal = {Doklady Akademii Nauk},
     pages = {799--801},
     publisher = {mathdoc},
     volume = {139},
     number = {4},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_139_4_a6/}
}