@article{EJDE_2003__2003__a45,
     author = {Hempel,  Reiner and Besch,  Alexander},
     title = {Magnetic barriers of compact support and eigenvalues in spectral gaps},
     journal = {Electronic journal of differential equations},
     year = {2003},
     volume = {2003},
     zbl = {1037.35063},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a45/}
}