@article{8496,
  author       = {Avila, Artur and De Simoi, Jacopo and Kaloshin, Vadim},
  issn         = {0003-486X},
  journal      = {Annals of Mathematics},
  number       = {2},
  pages        = {527--558},
  publisher    = {Princeton University Press},
  title        = {{An integrable deformation of an ellipse of small eccentricity is an ellipse}},
  doi          = {10.4007/annals.2016.184.2.5},
  volume       = {184},
  year         = {2016},
}