@article{DAN_1988_300_2_a7,
     author = {N. Radjabov},
     title = {Representation of a manifold of solutions, and boundary value problems for a class of second-order linear hyperbolic systems with an interior singular line},
     journal = {Doklady Akademii Nauk},
     pages = {291--296},
     publisher = {mathdoc},
     volume = {300},
     number = {2},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_300_2_a7/}
}