@article{DAN_1976_227_4_a9,
     author = {V. K. Romanko},
     title = {Boundary value problems for some differential-operator equations},
     journal = {Doklady Akademii Nauk},
     pages = {812--815},
     publisher = {mathdoc},
     volume = {227},
     number = {4},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_227_4_a9/}
}