@inproceedings{DBLP:conf/ecsqaru/MileoS07, title = {Qualitative Constraint Enforcement in Advanced Policy Specification}, author = {Mileo, Alessandra and Schaub, Torsten}, booktitle = {{ECSQARU}}, pages = {695--706}, publisher = {Springer}, series = {Lecture Notes in Computer Science}, volume = {4724}, year = {2007} }