@inproceedings{Ghisellini:2012h0,
  author = "Ghisellini, Gabriele",
  title = "{GRBs have preferred jet opening angles and bulk Lorentz factors}",
  doi = "10.22323/1.152.0015",
  booktitle = "Proceedings of Gamma-Ray Bursts 2012 Conference {\textemdash} PoS(GRB 2012)",
  year = 2012,
  volume = "152",
  pages = "015"
}