@article{2042,
  author = {D. Lazzati and Rosalba Perna},
  title = {X-ray flares and the duration of engine activity in gamma-ray bursts},
  year = {2007},
  journal = {Monthly Notices of the Royal Astronomical Society: Letters},
  volume = {375},
  pages = {L46 - L50},
  month = {02/2007},
  issn = {1745-3925},
  doi = {10.1111/j.1745-3933.2006.00273.x},
}