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@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/} }
D. G. Orlovskii. An inverse problem for a second-order differential equation in a Banach space. Differencialʹnye uravneniâ, Tome 25 (1989) no. 6, pp. 1000-1009. http://geodesic.mathdoc.fr/item/DE_1989_25_6_a12/