@article{PMIHES_1986__63__153_0,
     author = {Mather, John N.},
     title = {A criterion for the non-existence of invariant circles},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {153--204},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {63},
     year = {1986},
     mrnumber = {849654},
     zbl = {0603.58028},
     language = {en},
     url = {http://www.numdam.org/item/PMIHES_1986__63__153_0/}
}