@article{DE_1967_3_2_a14,
     author = {E. A. Ostrovskii},
     title = {Expansion formulas for a boundary value problem with a complex parameter},
     journal = {Differencialʹnye uravneni\^a},
     pages = {327--340},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_2_a14/}
}