COMPTEL observations of the gamma-ray blazar PKS 1622-297 S. Zhang, W. Collmar, K. Bennett, H. Bloemen, W. Hermsen, M. McConnell, O. Reimer, V. Schönfelder, S. J. Wagner and O. R. Williams A&A, 386 3 (2002) 843-853 Published online: 15 May 2002 DOI: 10.1051/0004-6361:20020267