@article{GDZPPN00220097X,
title = {Global behaviour of solution branches for some Neumann problems depending on one or several parameters.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {346},
year = {1984},
pages = {1-31},
zbl = {0513.34033},
url = {http://dml.mathdoc.fr/item/GDZPPN00220097X}
}
Schaaf, Renate. Global behaviour of solution branches for some Neumann problems depending on one or several parameters.. Journal für die reine und angewandte Mathematik, Tome 346 (1984) pp. 1-31. http://gdmltest.u-ga.fr/item/GDZPPN00220097X/