@article{GDZPPN002069849,
title = {Critical point theory for perturbations of symmetric functionals.},
journal = {Commentarii mathematici Helvetici},
volume = {71},
year = {1996},
pages = {570-593},
zbl = {0873.58018},
url = {http://dml.mathdoc.fr/item/GDZPPN002069849}
}
Clapp, Monica. Critical point theory for perturbations of symmetric functionals.. Commentarii mathematici Helvetici, Tome 71 (1996) pp. 570-593. http://gdmltest.u-ga.fr/item/GDZPPN002069849/