@article{GDZPPN002094045,
title = {Generalized Cohomological Index Theories for Lie Group Actions with an Application to Bifurcation Questions for Hamiltonian Systems.},
journal = {Inventiones mathematicae},
volume = {46},
year = {1978},
pages = {139-174},
zbl = {0403.57001},
url = {http://dml.mathdoc.fr/item/GDZPPN002094045}
}
Fadell, E.R.; Rabinowitz, P.H. Generalized Cohomological Index Theories for Lie Group Actions with an Application to Bifurcation Questions for Hamiltonian Systems.. Inventiones mathematicae, Tome 46 (1978) pp. 139-174. http://gdmltest.u-ga.fr/item/GDZPPN002094045/