@conference{1650,
  author = {P. D'Avanzo and Rosalba Perna},
  title = {The frontier of darkness: the cases of GRB 040223, GRB 040422, GRB 040624},
  year = {2006},
  publisher = {AIP},
  address = {Washington, D.C. (USA)},
  doi = {10.1063/1.2207942},
}