@article{MZ_1990__203_3_174147,
     author = {Helmut Hofer and Ivar Ekeland},
     title = {Symplectic {Topology} and {Hamiltonian} {Dynamics} {II.}},
     journal = {Mathematische Zeitschrift},
     pages = {553--568},
     publisher = {mathdoc},
     volume = {203},
     number = {3},
     year = {1990},
     zbl = {0729.53039},
     url = {http://geodesic.mathdoc.fr/item/MZ_1990__203_3_174147/}
}