TY  - JOUR
AU  - Petry, Walter
TI  - Existence theorems for operator equations and nonlinear elliptic boundary-value problems
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1973
SP  - 27
EP  - 46
VL  - 14
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1973__14_1_a2/
LA  - en
ID  - CMUC_1973__14_1_a2
ER  -