@article{EJDE_2002__2002__a269,
     author = {Clark,  Marcondes R. and Lima,  Osmundo A.},
     title = {Existence of solutions for a variational unilateral system},
     journal = {Electronic journal of differential equations},
     year = {2002},
     volume = {2002},
     zbl = {0991.35054},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a269/}
}