@article{3197,
author = {Amaral, Lu\'\i s},
title = {Nonresonance conditions at the two first eigenvalues for semilinear equations},
journal = {Portugaliae mathematica},
volume = {50},
year = {1993},
pages = {255-262},
zbl = {0816.35029},
mrnumber = {1244505},
language = {en},
url = {http://dml.mathdoc.fr/item/3197}
}
Amaral, Luís. Nonresonance conditions at the two first eigenvalues for semilinear equations. Portugaliae mathematica, Tome 50 (1993) pp. 255-262. http://gdmltest.u-ga.fr/item/3197/