@article{EJDE_2004__2004__a198,
     author = {Janno,  Jaan},
     title = {Recovering a time- and space-dependent kernel in a hyperbolic integro-differential equation from a restricted {Dirichlet-to-Neumann} operator},
     journal = {Electronic journal of differential equations},
     year = {2004},
     volume = {2004},
     zbl = {1066.45007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a198/}
}