Kneiske, Tanja ManuelaMannheim, Karl2009-09-102009-09-102008Astronomy and Astrophysics, 2008; 479 (1):41-470004-6361http://hdl.handle.net/2440/50829© ESO 2008. Article published by EDP Sciencesengalaxies: BL Lacertae objects: general; cosmology: diffuse radiation; gamma rays: observationsBL Lacertae contribution to the extragalactic gamma-ray backgroundJournal article002008018010.1051/0004-6361:200656050002529580000112-s2.0-38849108732