@article{RCP25_1979__27__63_0,
     author = {Ekeland, I.},
     title = {Solutions p\'eriodiques des \'equations de {Hamilton}},
     journal = {Les rencontres physiciens-math\'ematiciens de Strasbourg -RCP25},
     note = {talk:6},
     pages = {63--73},
     publisher = {Institut de Recherche Math\'ematique Avanc\'ee - Universit\'e Louis Pasteur},
     volume = {27},
     year = {1979},
     language = {fr},
     url = {http://www.numdam.org/item/RCP25_1979__27__63_0/}
}