@inproceedings{OrBacHierachies,
 author = {Fr\'ed\'eric Cuppens and Nora Cuppens-Boulahia and Alexandre Mi\`ege},
 title = {{Inheritance hierachies in the Or-BAC Model and Application in a network environnement}},
 booktitle = {2nd Foundation of Computer Security Workshop},
 year = {2004},
 adress = {Turku, Finlande},
 month = {July},
}