@article{CMUC_1973__14_1_a5,
     author = {Ne\v{c}as, Jind\v{r}ich},
     title = {On the range of nonlinear operators with linear asymptotes which are not invertible},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {63--72},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {1973},
     mrnumber = {0318995},
     zbl = {0257.47032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1973__14_1_a5/}
}