%0 Journal Article
%A Monica Clapp
%T Critical point theory for perturbations of symmetric functionals.
%J Commentarii mathematici Helvetici
%D 1996
%P 570-593
%V 71
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1996__71_2_140414/
%F CMH_1996__71_2_140414