TY  - JOUR
AU  - Amaral, Luís
TI  - Nonresonance conditions at the two first eigenvalues for semilinear equations
JO  - Portugaliae mathematica
PY  - 1993
SP  - 255
EP  - 262
VL  - 50
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1993__50_3_115687/
LA  - en
ID  - PORMA_1993__50_3_115687
ER  -