@article{DAN_1966_170_6_a4,
     author = {A. O. Kravitsky},
     title = {Expansion in a series of eigenfunctions of a nonself-adjoint boundary value problem},
     journal = {Doklady Akademii Nauk},
     pages = {1255--1258},
     publisher = {mathdoc},
     volume = {170},
     number = {6},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_170_6_a4/}
}