@article{FORUM_1992__4_6_141680,
     author = {Jan Chabrowski},
     title = {On nonlinear eigenvaule problems.},
     journal = {Forum mathematicum},
     pages = {359--376},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1992},
     zbl = {0793.35068},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1992__4_6_141680/}
}