@article{1861,
  author = {Kevin Heng and D. Lazzati and Rosalba Perna},
  title = {Dust Echoes from the Ambient Medium of Gamma-Ray Bursts},
  year = {2007},
  journal = {The Astrophysical Journal},
  volume = {662},
  pages = {1119-1128},
  month = {06/2007},
  issn = {0004-637X},
  doi = {10.1086/517913},
}