Origin of the X-ray disc-reflection steep radial emissivity J. Svoboda, M. Dovčiak, R. W. Goosmann, P. Jethwa, V. Karas, G. Miniutti and M. Guainazzi A&A, 545 (2012) A106 Published online: 14 September 2012 DOI: 10.1051/0004-6361/201219701