@article{AIHPC_1989__S6__259_0, author = {Fournier, Gilles and Willem, M.}, title = {Multiple solutions of the forced double pendulum equation}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, volume = {S6}, year = {1989}, pages = {259-281}, mrnumber = {1204018}, zbl = {0683.70022}, language = {en}, url = {http://dml.mathdoc.fr/item/AIHPC_1989__S6__259_0} }
Fournier, G.; Willem, M. Multiple solutions of the forced double pendulum equation. Annales de l'I.H.P. Analyse non linéaire, Tome S6 (1989) pp. 259-281. http://gdmltest.u-ga.fr/item/AIHPC_1989__S6__259_0/
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