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@article{MAN_1983__262_163706, author = {J.M. Coron}, title = {Periodic {Solutions} of a {Nonlinear} {Wave} {Equation} {Without} {Assumption} of {Monotonicity.}}, journal = {Mathematische Annalen}, pages = {273--286}, publisher = {mathdoc}, volume = {262}, year = {1983}, zbl = {0489.35061}, url = {http://geodesic.mathdoc.fr/item/MAN_1983__262_163706/} }
J.M. Coron. Periodic Solutions of a Nonlinear Wave Equation Without Assumption of Monotonicity.. Mathematische Annalen, Tome 262 (1983), pp. 273-286. http://geodesic.mathdoc.fr/item/MAN_1983__262_163706/