@article{GDZPPN002230429,
title = {Critical orbits of symmetric functionals.},
journal = {Manuscripta mathematica},
volume = {67},
year = {1990},
pages = {129-152},
zbl = {0755.58018},
url = {http://dml.mathdoc.fr/item/GDZPPN002230429}
}
Bartsch, Thomas. Critical orbits of symmetric functionals.. Manuscripta mathematica, Tome 67 (1990) pp. 129-152. http://gdmltest.u-ga.fr/item/GDZPPN002230429/