Piero A. Bonatti Juri Luca De Coi Daniel Olmedilla Luigi Sauro Rule-Based Policy Representations and Reasoning. 201-232 2009 REWERSE http://dx.doi.org/10.1007/978-3-642-04581-3_4 series/lncs/5500 db/series/lncs/lncs5500.html#BonattiCOS09