@article{DE_1968_4_1_a15,
     author = {A. O. Kravitsky},
     title = {The two-fold expansion of a certain non-selfadjoint boundary value problem in series of eigenfunctions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {165--177},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_1_a15/}
}