The Luminosity Function and Formation Rate History of GRBs
  The isotropic luminosity function (LF) and formation rate history (FRH) of long GRBs is by the first time constrained by using jointly both the observed GRB peak-flux and redshift distributions. Our results support an evolving LF and a FRH that keeps increasing after z=2. We discuss some interesting implications related to these results. 
C. Firmani (1,2), V. Avila-Reese (2), G. Ghisellini (1), A.V. Tutukov   (3); ((1) Osserv. Astron. di Brera, Italy; (2) Insti...