Krühler, T. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Greiner, J. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Tanvir, N. R., Fox, D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., et al. (2009). A γ-ray burst at a redshift of z approximately 8.2. Nature, 461(7268), 1254-1257. doi:10.1038/nature08459.