@InProceedings{Basin_etal:usagecontrol_distributed,
  author = 	 {David Basin and Mat\'u\v{s} Harvan and Felix Klaedtke and Eugen Z\u{a}linescu},
  title = 	 {Monitoring Usage-control Policies in Distributed Systems},
  booktitle =    {Proceedings of the 18th International Symposium on Temporal Representation and Reasoning (TIME'11)},
  year =         {2011},
  pages =        {88--95},
  publisher =    {IEEE Computer Society},
  address =      {Los Alamitos, CA, USA},
}