1ES 1927+654: Persistent and rapid X-ray variability in an AGN with low intrinsic neutral X-ray absorption and narrow optical emission linesTh. Boller, W. Voges, M. Dennefeld, I. Lehmann, P. Predehl, V. Burwitz, E. Perlman, L. Gallo, I. E. Papadakis and S. AndersonA&A, 397 2 (2003) 557-564DOI: https://doi.org/10.1051/0004-6361:20021520
