@article{Saez:2015Ca,
  author = "Saez, Dounia  and  Gotz, Diego",
  title = "{Constraining GRB progenitors environment with Swift XRT}",
  doi = "10.22323/1.233.0075",
  journal = "PoS",
  year = 2015,
  volume = "SWIFT 10",
  pages = "075"
}