@article{88583,
      author       = "Pinto-de-Carvalho, Sònia  and Ramírez Ros, Rafael  and
                      Centre de Recerca Matemàtica ",
      title        = "<a
                      href="/search?f=title&p=Nonpersistence%20of%20resonant%20caustics%20in%20perturbed%20elliptic%20billiards&sc=1&ln=en">Nonpersistence
                      of resonant caustics in perturbed elliptic billiards</a>",
      year         = "2011",
}