@inproceedings{Wong&Gibbons2008:Relative,
  title = "A Relative Timed Semantics for BPMN",
  author = "Peter Wong and Jeremy Gibbons",
  year = "2008",
  address = "Zurich",
  booktitle = "Foundations of Coordination Languages and Software Architectures (FOCLASA)",
  month = "July",
  url = "http://www.comlab.ox.ac.uk/jeremy.gibbons/publications/relative.pdf",
}