@article{CMUC_1981_22_2_a0,
     author = {Dr\'abek, Pavel},
     title = {Bounded nonlinear perturbations of second order linear elliptic problems},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {215--221},
     year = {1981},
     volume = {22},
     number = {2},
     mrnumber = {620358},
     zbl = {0461.35036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1981_22_2_a0/}
}