@article{SEDP_1987-1988____A23_0,
     author = {Ekeland, I. and Hofer, H.},
     title = {Symplectic topology and hamiltonian dynamics},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:23},
     pages = {1--4},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1987-1988},
     mrnumber = {1018195},
     zbl = {0668.58016},
     language = {en},
     url = {http://archive.numdam.org/item/SEDP_1987-1988____A23_0/}
}