@article{DAN_1977_232_5_a11,
     author = {V. V. Tikhomirov},
     title = {On a nonregular boundary value problem},
     journal = {Doklady Akademii Nauk},
     pages = {1026--1027},
     publisher = {mathdoc},
     volume = {232},
     number = {5},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_232_5_a11/}
}