Jaime A. Pavlich-Mariscal Steven A. Demurjian Laurent D. Michel A Framework of Composable Access Control Definition, Enforcement and Assurance. 13-22 2008 SCCC http://dx.doi.org/10.1109/SCCC.2008.18 conf/sccc/2008 db/conf/sccc/sccc2008.html#Pavlich-MariscalDM08