@inproceedings{hindriks13aamas,
  author    = {Koen V. Hindriks and M. Birna van Riemsdijk},
  title     = {A real-time semantics for norms with deadlines},
  booktitle = "Proceedings of the twelfth international joint conference on autonomous agents and multiagent systems (AAMAS'13)",  
  year      = {2013},
  publisher = "IFAAMAS",
pages = "507--514"
}