Contribution of BL Lacertae Objects to the Extragalactic Gamma-ray Background
Proceedings article published in 2012 by
M. Ajello 
,
M. Shaw,
R.~W Romani,
C. Dermer,
F. Massaro,
Fermi Lat Collaboration
,
M. Shaw,
R.~W Romani,
C. Dermer,
F. Massaro,
Fermi Lat Collaboration
