@article{GDZPPN002440601,
title = {Smoothness of global positive branches of nonlinear elliptic problems over symmetric domains.},
journal = {Mathematische Zeitschrift},
volume = {209},
year = {1992},
pages = {41-48},
zbl = {0780.35041},
url = {http://dml.mathdoc.fr/item/GDZPPN002440601}
}
Kielhöfer, Hansjörg. Smoothness of global positive branches of nonlinear elliptic problems over symmetric domains.. Mathematische Zeitschrift, Tome 209 (1992) pp. 41-48. http://gdmltest.u-ga.fr/item/GDZPPN002440601/