Claudio Agostino Ardagna Sabrina De Capitani di Vimercati Stefano Paraboschi Eros Pedrini Pierangela Samarati Mario Verdicchio Expressive and Deployable Access Control in Open Web Service Applications. 96-109 2011 4 IEEE T. Services Computing 2 http://doi.ieeecomputersociety.org/10.1109/TSC.2010.29 db/journals/tsc/tsc4.html#ArdagnaVPPSV11