@article{MAN_1985__270_182973,
     author = {Peter Hess},
     title = {On the {Relative} {Completeness} of the {Generalized} {Eigenvectors} of {Elliptic} {Eigenvalue} {Problems} with {Indefinite} {Weight} {Functions.}},
     journal = {Mathematische Annalen},
     pages = {467--476},
     publisher = {mathdoc},
     volume = {270},
     year = {1985},
     zbl = {0572.47006},
     url = {http://geodesic.mathdoc.fr/item/MAN_1985__270_182973/}
}