@article{EJDE_2002__2002__a3,
     author = {Midodashvili,  Bidzina},
     title = {A nonlocal problem for fourth order hyperbolic equations with multiple characteristics},
     journal = {Electronic journal of differential equations},
     year = {2002},
     volume = {2002},
     zbl = {1011.35090},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a3/}
}