@article{PIOTROWSKI:2012Tf,
  author = "PIOTROWSKI, Lech Wiktor",
  title = "{Constraints on the optical precursor to the naked-eye burst GRB080319B from 'Pi of the Sky' observations}",
  doi = "10.22323/1.152.0053",
  journal = "PoS",
  year = 2012,
  volume = "GRB 2012",
  pages = "053"
}