Evidence for ultra-fast outflows in radio-quiet AGNs - I. Detection and statistical incidence of Fe K-shell absorption linesF. Tombesi, M. Cappi, J. N. Reeves, G. G. C. Palumbo, T. Yaqoob, V. Braito and M. DadinaA&A, 521 (2010) A57DOI: https://doi.org/10.1051/0004-6361/200913440
