@article{Mignani:2017,
  author  = "R. Mignani and V. Testa and D. González-Cianiulef and R. Taverna and R. Turolla and S. Zane and K. Wu",
  title   = "Evidence for vacuum birefringence from the first optical-polarimetry measurement of the isolated neutron star RX J1856.5-3754",
  journal = "Monthly Notices of the Royal Astronomical Society",
  volume  = "Vol. 465",
  number  = "iss. 1",
  pages   = "492--500",
  year    = "2017",
}