TY  - JOUR
AU  - Jens Frehse
TI  - A Landesman-Lazer alternative theorem for a class of optimization problems.
JO  - Commentarii mathematici Helvetici
PY  - 1979
SP  - 328
EP  - 333
VL  - 54
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1979__54_139787/
ID  - CMH_1979__54_139787
ER  -