@article{Słowikowska:2009,
  author  = "A. Słowikowska and G. Kanbach and M. Kramer and A. Stefanescu",
  title   = "Optical polarization of the Crab pulsar: precision measurements and comparison to the radio emission",
  journal = "Monthly Notices of the Royal Astronomical Society",
  volume  = "Vol. 397",
  number  = "no 1",
  pages   = "103--123",
  year    = "2009",
}