@article{AIHPC_1990__7_6_525_0, author = {Brousseau, V.}, title = {Espaces de {Krein} et index des syst\`emes hamiltoniens}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, pages = {525--560}, publisher = {Gauthier-Villars}, volume = {7}, number = {6}, year = {1990}, zbl = {0719.58030}, mrnumber = {1079571}, language = {fr}, url = {http://archive.numdam.org/item/AIHPC_1990__7_6_525_0/} }