The EUV variability of the luminous QSO HS 1700+6416 D. Reimers, H.-J. Hagen, J. Schramm, G. A. Kriss and J. M. Shull A&A, 436 2 (2005) 465-468 Published online: 30 May 2005 DOI: 10.1051/0004-6361:20042303