@inproceedings{MRT09,
  author        = {S. Mauw and S. Radomirovi\'{c} and M. Torabi Dashti},
  title         = {Minimal message complexity of asynchronous multi-party contract signing},
  booktitle     = {Proceedings of the 22nd IEEE Computer Security Foundations Symposium (CSF'09)},
  publisher     = {IEEE Computer Society},
  year          = {2009},
  pages         = {13--25},
  url           = {ftp://ftp.inf.ethz.ch/pub/publications/tech-reports/6xx/616.pdf}
}