@article{DE_2000_36_10_a22,
     author = {A. M. Denisov},
     title = {An inverse problem for a hyperbolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1427--1429},
     year = {2000},
     volume = {36},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_10_a22/}
}