>2001: fraile al. found a cluster of the jet-collimated energies; Panaitescu Kumar fitted the afterglow data andobtained the model parameters >2002 the Amati correlation was found Zhang meszaros analyzed spectral break models of GRBS: Rossiet al and zhang meszaros discussed the structured jet models; Fan et al. found the magnetized reverse shock in GrB 990123 >2003: Schaefer discussed the cosmological use of GrBs; >2004 the Ghirlanda correlation was found Daiet al. used this relation to constrain the cosmological parameters➢ 2001: Frail et al. found a cluster of the jet-collimated energies; Panaitescu & Kumar fitted the afterglow data and obtained the model parameters ➢ 2002: the Amati correlation was found; Zhang & Meszaros analyzed spectral break models of GRBs; Rossi et al. and Zhang & Meszaros discussed the structured jet models; Fan et al. found the magnetized reverse shock in GRB 990123 ➢ 2003: Schaefer discussed the cosmological use of GRBs; ➢ 2004: the Ghirlanda correlation was found; Dai et al. used this relation to constrain the cosmological parameters