Metzger, M. R.; Djorgovski, S. G.; Kulkarni, S. R.; Steidel, C. C.; Adelberger, K. L. «Spectral constraints on the redshift of the optical counterpart to the γ-ray burst of 8 May 1997». Nature, 387, 6636, 1997, pàg. 878–880. Bibcode: 1997Natur.387..878M. DOI: 10.1038/43132.
Frail, D. A.; Kulkarni, S. R.; Nicastro, L.; Feroci, M.; Taylor, G. B. «The radio afterglow from the γ-ray burst of 8 May 1997». Nature, 389, 6648, 1997, pàg. 261–263. Bibcode: 1997Natur.389..261F. DOI: 10.1038/38451.
Metzger, M. R.; Djorgovski, S. G.; Kulkarni, S. R.; Steidel, C. C.; Adelberger, K. L. «Spectral constraints on the redshift of the optical counterpart to the γ-ray burst of 8 May 1997». Nature, 387, 6636, 1997, pàg. 878–880. Bibcode: 1997Natur.387..878M. DOI: 10.1038/43132.
Frail, D. A.; Kulkarni, S. R.; Nicastro, L.; Feroci, M.; Taylor, G. B. «The radio afterglow from the γ-ray burst of 8 May 1997». Nature, 389, 6648, 1997, pàg. 261–263. Bibcode: 1997Natur.389..261F. DOI: 10.1038/38451.