Federica Paci Rodolfo Ferrini Elisa Bertino Identity Attribute-Based Role Provisioning for Human WS-BPEL Processes. 535-542 2009 ICWS http://dx.doi.org/10.1109/ICWS.2009.84 conf/icws/2009 db/conf/icws/icws2009.html#PaciFB09