@article{CMUC_1978_19_2_a15,
     author = {Fu\v{c}{\'\i}k, Svatopluk and Hess, Peter},
     title = {Nonlinear perturbations of linear operators having nullspace with strong unique continuation property {(Preliminary} communication)},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {403--407},
     year = {1978},
     volume = {19},
     number = {2},
     mrnumber = {0487631},
     zbl = {0371.47051},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1978_19_2_a15/}
}