@article{AIHPC_1990__7_4_287_0, author = {Wysocki, K.}, title = {Multiple critical points for variational problems on partially ordered Hilbert spaces}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, volume = {7}, year = {1990}, pages = {287-304}, mrnumber = {1067777}, zbl = {0709.58013}, language = {en}, url = {http://dml.mathdoc.fr/item/AIHPC_1990__7_4_287_0} }
Wysocki, K. Multiple critical points for variational problems on partially ordered Hilbert spaces. Annales de l'I.H.P. Analyse non linéaire, Tome 7 (1990) pp. 287-304. http://gdmltest.u-ga.fr/item/AIHPC_1990__7_4_287_0/
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