@article{10_4153_CJM_2006_004_6,
     author = {Filippakis, Michael and Gasi\'nski, Leszek and Papageorgiou, Nikolaos S.},
     title = {Multiplicity {Results} for {Nonlinear} {Neumann} {Problems}},
     journal = {Canadian journal of mathematics},
     pages = {64--92},
     year = {2006},
     volume = {58},
     number = {1},
     doi = {10.4153/CJM-2006-004-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2006-004-6/}
}