The structure of the ultrarelativistic prompt emission phase and the properties of the black hole in GRB 180720BF. Rastegarnia, R. Moradi, J. A. Rueda, R. Ruffini, Liang Li, S. Eslamzadeh, Y. Wang and S. S. XueEur. Phys. J. C, 82 9 (2022) 778DOI: https://doi.org/10.1140/epjc/s10052-022-10750-x