Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1993__50_3_115687, author = {Amaral, Lu{\'\i}s}, title = {Nonresonance conditions at the two first eigenvalues for semilinear equations}, journal = {Portugaliae mathematica}, pages = {255--262}, publisher = {mathdoc}, volume = {50}, number = {3}, year = {1993}, mrnumber = {1244505}, zbl = {0816.35029}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1993__50_3_115687/} }
Amaral, Luís. Nonresonance conditions at the two first eigenvalues for semilinear equations. Portugaliae mathematica, Tome 50 (1993) no. 3, pp. 255-262. http://geodesic.mathdoc.fr/item/PORMA_1993__50_3_115687/