TY - JOUR AU - Michele Trenti AU - Rosalba Perna AU - Sandro Tacchella BT - The Astrophysical Journal DA - 2013-08 DO - 10.1088/2041-8205/773/2/L22 PY - 2013 EP - L22 T2 - The Astrophysical Journal TI - Gamma-Ray Burst and Star Formation Rates: The Physical Origin for the Redshift Evolution of their Ratio UR - http://stacks.iop.org/2041-8205/773/i=2/a=L22?key=crossref.487f36759621f2c0ddf9ca50f66e8a67 VL - 773 SN - 2041-8205 ER -