@INPROCEEDINGS{KRAU-10-STM,
  author = {L. Krautsevich and A. Lazouski and F. Martinelli and A. Yautsiukhin.},
  title = {Influence of Attribute Freshness on Decision Making in Usage Control},
  booktitle = {Proceedings of the 6th International Workshop on Security and Trust Management},
  year = {2010},
}