X-ray view of four high-luminosity Swift/BAT AGN: Unveiling obscuration and reflection with SuzakuV. Fioretti, L. Angelini, R. F. Mushotzky, M. Koss and G. MalagutiA&A, 555 (2013) A44DOI: https://doi.org/10.1051/0004-6361/201219460