@article{3206, author = {Michele Trenti and Rosalba Perna and Sandro Tacchella}, title = {Gamma-Ray Burst and Star Formation Rates: The Physical Origin for the Redshift Evolution of their Ratio}, year = {2013}, journal = {The Astrophysical Journal}, volume = {773}, pages = {L22}, month = {2013-08}, issn = {2041-8205}, url = {http://stacks.iop.org/2041-8205/773/i=2/a=L22?key=crossref.487f36759621f2c0ddf9ca50f66e8a67}, doi = {10.1088/2041-8205/773/2/L22}, }