@article{JRAM_1986__368_152845,
     author = {P.J. McKenna and A.C. Lazer},
     title = {Multiplicity of solutions of nonlinear boundary value problems with nonlinearities crossing several higher eigenvalues.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {184--200},
     publisher = {mathdoc},
     volume = {368},
     year = {1986},
     zbl = {0588.35036},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1986__368_152845/}
}