@article{JRAM_1982__333_152436,
     author = {Hermann Sohr},
     title = {A new perturbation criterion for two nonlinear m-accretive operators with applications to semilinear equations.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--11},
     publisher = {mathdoc},
     volume = {333},
     year = {1982},
     zbl = {0476.47038},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1982__333_152436/}
}