@article{DE_2004_40_9_a0,
     author = {A. M. Denisov},
     title = {An existence theorem for an inverse problem for a semilinear hyperbolic system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1155--1165},
     year = {2004},
     volume = {40},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_9_a0/}
}