Greiner, J. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Fynbo, J. P. U., Sollerman, J., Hjorth, J., Grundahl, F., Gorosabel, J., Weidinger, M., et al. (2004). On the afterglow of the X-ray flash of 2003 July 23: photometric evidence for an off-axis gamma-ray burst with an associated supernova. The Astrophysical Journal, 609(2), 962-971.