Active galactic nuclei behind the SMC selected from radio and X-ray surveys R. Sturm, D. Drašković, M. D. Filipović, F. Haberl, J. Collier, E. J. Crawford, M. Ehle, A. De Horta, W. Pietsch, N. F. H. Tothill and G. Wong A&A, 558 (2013) A101 Published online: 14 October 2013 DOI: 10.1051/0004-6361/201220564