@article{2520,
  author = {D. Lazzati and B. Morsony and Mitchell Begelman},
  title = {Very High Efficiency Photospheric Emission in Long-Duration γ-Ray Bursts},
  year = {2009},
  journal = {The Astrophysical Journal},
  volume = {700},
  pages = {L47 - L50},
  month = {07/2009},
  issn = {0004-637X},
  doi = {10.1088/0004-637X/700/1/L47},
}