@article{CMUC_1987__28_4_a17,
     author = {Dr\'abek, Pavel},
     title = {Landesman-Lazer condition for periodic problems with jumping nonlinearities},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {784--785},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1987__28_4_a17/}
}