@article{MZ_1988__200_3_174015,
     author = {H. Hofer and I. Ekeland},
     title = {Symplectic {Topology} and {Hamiltonian} {Dynamics.}},
     journal = {Mathematische Zeitschrift},
     pages = {355--378},
     publisher = {mathdoc},
     volume = {200},
     number = {3},
     year = {1988},
     zbl = {0641.53035},
     url = {http://geodesic.mathdoc.fr/item/MZ_1988__200_3_174015/}
}