Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1991_27_10_a14, author = {D. G. Orlovskii}, title = {An inverse problem for an equation of hyperbolic type in a {Hilbert} space}, journal = {Differencialʹnye uravneni\^a}, pages = {1771--1778}, publisher = {mathdoc}, volume = {27}, number = {10}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_10_a14/} }
D. G. Orlovskii. An inverse problem for an equation of hyperbolic type in a Hilbert space. Differencialʹnye uravneniâ, Tome 27 (1991) no. 10, pp. 1771-1778. http://geodesic.mathdoc.fr/item/DE_1991_27_10_a14/