@article{PMIHES_1986__63__153_0,
     author = {John N. Mather},
     title = {A criterion for the non-existence of invariant circles},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {153--204},
     year = {1986},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {63},
     doi = {10.1007/BF02831625},
     mrnumber = {849654},
     zbl = {0603.58028},
     language = {en},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02831625/}
}