@article{CMH_1983__58_139952,
     author = {Michael Struwe},
     title = {Quasilinear elliptic eigenvalue problems.},
     journal = {Commentarii mathematici Helvetici},
     pages = {509--528},
     publisher = {mathdoc},
     volume = {58},
     year = {1983},
     zbl = {0531.35035},
     url = {http://geodesic.mathdoc.fr/item/CMH_1983__58_139952/}
}