@inbook {IOPORT.02144561,
    author       = {Dr\'abek, Pavel and Robinson, Stephen B.},
    title        = {Eigenvalue problems, resonance problems and open problems.},
    year         = {2004},
    booktitle    = {Variational methods: open problems, recent progress, and numerical algorithms. Proceedings of the conference, Northern Arizona University, Flagstaff, AZ, USA, June 5--8, 2002},
    isbn         = {0-8218-3339-1},
    pages        = {141-149},
    publisher    = {Providence, RI: American Mathematical Society (AMS)},
    abstract     = {Summary: We discuss several open problems related to the eigenvalues and eigenfunctions of the $p$-Laplacian. We emphasize the fundamental role played by the variational characterization of eigenvalues and eigenfunctions.},
    identifier   = {02144561},
}