@article{DE_1989_25_6_a12,
     author = {D. G. Orlovskii},
     title = {An inverse problem for a second-order differential equation in a {Banach} space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1000--1009},
     publisher = {mathdoc},
     volume = {25},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_6_a12/}
}