@article{EJDE_2003__2003__a64,
     author = {Guedda,  Mohammed},
     title = {Blow up of solutions to semilinear wave equations},
     journal = {Electronic journal of differential equations},
     year = {2003},
     volume = {2003},
     zbl = {1032.35137},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a64/}
}