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@article{IM_1987__90_143499, author = {H. Hofer and E. Zehnder}, title = {Periodic {Solutions} on hypersurfaces and a result by {C.} {Viterbo.}}, journal = {Inventiones mathematicae}, pages = {1--10}, publisher = {mathdoc}, volume = {90}, year = {1987}, zbl = {0631.58022}, url = {http://geodesic.mathdoc.fr/item/IM_1987__90_143499/} }
H. Hofer; E. Zehnder. Periodic Solutions on hypersurfaces and a result by C. Viterbo.. Inventiones mathematicae, Tome 90 (1987), pp. 1-10. http://geodesic.mathdoc.fr/item/IM_1987__90_143499/