@article{DAN_1958_121_1_a0,
     author = {R. G. Barantsev},
     title = {Expansion theorems connected with boundary problems for equation $u_{xx}-K(x)u_{tt}=0$ within the strip $0\le x\le1$
},
     journal = {Doklady Akademii Nauk},
     pages = {9--12},
     publisher = {mathdoc},
     volume = {121},
     number = {1},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_121_1_a0/}
}