@article{EJDE_2004__2004__a25,
     author = {Georgiev,  Svetlin Georgiev},
     title = {Blow-up of solutions to a nonlinear wave equation},
     journal = {Electronic journal of differential equations},
     year = {2004},
     volume = {2004},
     zbl = {1053.35102},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a25/}
}