@inproceedings{JSVaidyaSACMAT08,
 author = {Jaideep Vaidya and Vijayalakshmi Atluri and Qi Guo and
Nabil Adam},
 title = {Migrating to optimal RBAC with minimal perturbation},
 booktitle = {SACMAT '08: Proceedings of the 13th ACM symposium on
Access control models and technologies},
 year = {2008},
 isbn = {978-1-60558-129-3},
 pages = {11--20},
 location = {Estes Park, CO, USA},
 doi = {http://doi.acm.org/10.1145/1377836.1377839},
 publisher = {ACM},
 address = {New York, NY, USA},
 }