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@article{MM2_1980__33_154752, author = {Klaus Thews}, title = {T-Periodic {Solutions} of {Time} {Dependent} {Hamiltonian} {Systems} with a {Potential} {Vanishing} at {Infinity.}}, journal = {Manuscripta mathematica}, pages = {327--338}, publisher = {mathdoc}, volume = {33}, year = {1980}, zbl = {0467.35009}, url = {http://geodesic.mathdoc.fr/item/MM2_1980__33_154752/} }
Klaus Thews. T-Periodic Solutions of Time Dependent Hamiltonian Systems with a Potential Vanishing at Infinity.. Manuscripta mathematica, Tome 33 (1980), pp. 327-338. http://geodesic.mathdoc.fr/item/MM2_1980__33_154752/