@article{02236268,
title = {Simplicity and stability of the first eigenvalue of a nonlinear elliptic system.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2005},
year = {2005},
pages = {1555-1563},
doi = {10.1155/IJMMS.2005.1555},
zbl = {1152.35368},
language = {en},
url = {http://dml.mathdoc.fr/item/02236268}
}
El Khalil, Abdelouahed; El Manouni, Said; Ouanan, Mohammed. Simplicity and stability of the first eigenvalue of a nonlinear elliptic system.. International Journal of Mathematics and Mathematical Sciences, Tome 2005 (2005) pp. 1555-1563. doi : 10.1155/IJMMS.2005.1555. http://gdmltest.u-ga.fr/item/02236268/