Origin of the X-ray disc-reflection steep radial emissivityJ. Svoboda, M. Dovčiak, R. W. Goosmann, P. Jethwa, V. Karas, G. Miniutti and M. GuainazziA&A, 545 (2012) A106DOI: https://doi.org/10.1051/0004-6361/201219701