@article{CMUC_1976_17_1_a4,
     author = {Fu\v{c}{\'\i}k, Svatopluk},
     title = {Remarks on the solvability and nonsolvability of weakly nonlinear equations},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {61--70},
     year = {1976},
     volume = {17},
     number = {1},
     mrnumber = {0410492},
     zbl = {0334.47042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1976_17_1_a4/}
}