@article{PMIHES_1989__70__47_0,
     author = {Herman, Michael R.},
     title = {In\'egalit\'es a priori pour des tores lagrangiens invariants par des diff\'eomorphismes symplectiques},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {47--101},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {70},
     year = {1989},
     mrnumber = {1067380},
     zbl = {0717.58020},
     language = {fr},
     url = {http://www.numdam.org/item/PMIHES_1989__70__47_0/}
}