@article{JEMS_1999_1_4_a0,
     author = {Edson de Faria and Welington de Melo},
     title = {Rigidity of critical circle mappings {I}},
     journal = {Journal of the European Mathematical Society},
     pages = {339--392},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {1999},
     doi = {10.1007/s100970050011},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s100970050011/}
}