1. Blazar candidates beyond redshift 4 observed by Swift. Issue 3 (28th November 2014) Authors: Sbarrato, T.; Ghisellini, G.; Tagliaferri, G.; Foschini, L.; Nardini, M.; Tavecchio, F.; Gehrels, N. Journal: Monthly notices of the Royal Astronomical Society Issue: Volume 446:Issue 3(2015) Page Start: 2483 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗