@inproceedings{Nagakura:2012L2,
  author = "Nagakura, Hiroki",
  title = "{Constraints to the GRB central engine from jet penetrability to massive stars}",
  doi = "10.22323/1.152.0103",
  booktitle = "Proceedings of Gamma-Ray Bursts 2012 Conference {\textemdash} PoS(GRB 2012)",
  year = 2012,
  volume = "152",
  pages = "103"
}