@inproceedings{CPer,
  title = "Environment and classical channels in categorical quantum mechanics",
  author = "Bob Coecke and Simon Perdrix",
  year = "2010",
  booktitle = "Proceedings of the 19th EACSL Annual Conference on Computer Science Logic (CSL)",
  note = "Extended version: {a}rXiv:1004.1598",
  pages = "230-244",
  series = "Lecture Notes in Computer Science",
  volume = "6247",
}