@article{GMJ_1999__6_6_48322,
     author = {Kiguradze, T.},
     title = {On the {Dirichlet} problem in a characteristic rectangle for fourth order linear singular hyperbolic equations.},
     journal = {Georgian mathematical journal},
     pages = {537--552},
     year = {1999},
     volume = {6},
     number = {6},
     zbl = {0930.35102},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_1999__6_6_48322/}
}