@article{1612,
  author = {M. Nardini and G. Ghisellini and G. Ghirlanda and F. Tavecchio and C. Firmani and D. Lazzati},
  title = {Clustering of the optical-afterglow luminosities  of long gamma-ray bursts},
  year = {2006},
  journal = {Astronomy and Astrophysics},
  volume = {451},
  pages = {821-833},
  month = {Jan-06-2006},
  issn = {0004-6361},
  url = {http://www.aanda.org/10.1051/0004-6361:20054085},
  doi = {10.1051/0004-6361:20054085},
}