Comparison of spatial and angular clustering of X-ray AGN L. Koutoulidis, M. Plionis, I. Georgantopoulos, A. Georgakakis, A. Akylas, S. Basilakos and G. Mountrichas A&A, 590 (2016) A23 Published online: 02 May 2016 DOI: 10.1051/0004-6361/201527814