@article{JEMS_2006_8_2_a16,
     author = {Jean Mawhin},
     title = {The periodic {Ambrosetti-Prodi} problem for nonlinear perturbations of the {p-Laplacian}},
     journal = {Journal of the European Mathematical Society},
     pages = {375--388},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2006},
     doi = {10.4171/jems/58},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/58/}
}