@article{GDZPPN00241810X,
title = {Existence and Multiplicity Theorems for Semi-linear Elliptic Boundary Value Problems.},
journal = {Mathematische Zeitschrift},
volume = {147},
year = {1976},
pages = {281-295},
zbl = {0331.35026},
url = {http://dml.mathdoc.fr/item/GDZPPN00241810X}
}
Amann, Herbert. Existence and Multiplicity Theorems for Semi-linear Elliptic Boundary Value Problems.. Mathematische Zeitschrift, Tome 147 (1976) pp. 281-295. http://gdmltest.u-ga.fr/item/GDZPPN00241810X/