@inproceedings{OrBacContext,
 author = {Fr\'ed\'eric Cuppens and Alexandre Mi\`ege},
 title = {{Modelling Contexts in the Or-BAC Model}},
 booktitle = {19th Annual Computer Security Applications Conference (ACSAC '03)},
 year = {2003},
 isbn = {0-7695-2041-3},
 }