@article{CMUC_1968_9_1_a13,
     author = {Fu\v{c}{\'\i}k, Svatopluk},
     title = {Fixed point theorems for sum of nonlinear mappings},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {133--143},
     year = {1968},
     volume = {9},
     number = {1},
     mrnumber = {0233245},
     zbl = {0181.15201},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1968_9_1_a13/}
}