@article{DAN_1988_299_1_a13,
     author = {M. S. Salakhitdinov and A. K. Urinov},
     title = {A nonlocal boundary value problem in a doubly connected domain for},
     journal = {Doklady Akademii Nauk},
     pages = {63--66},
     publisher = {mathdoc},
     volume = {299},
     number = {1},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_299_1_a13/}
}