TY  - RPRT
TI  - Policy machine : features, architecture, and specification 
AU  - Ferraiolo, David
AU  - Gavrila, Serban
AU  - Jensen, Wayne
PY  - 2014
PB  - National Institute of Standards and Technology
SN  - NIST IR 7987
DO  - 10.6028/NIST.IR.7987
ER  -