@inproceedings{Coecke:2008nx,
  title = "Interacting Quantum Observables",
  author = "Bob Coecke and Ross Duncan",
  year = "2008",
  booktitle = "Automata, Languages and Programming, 35th International Colloquium, ICALP 2008, Reykjavik, Iceland, July 7-11, 2008, Proceedings, Part II",
  keywords = "categorical quantum mechanics; quantum computing;",
  note = "A significantly revised and expanded version of this paper is available as preprint http://arxiv.org/abs/0906.4725",
  pages = "298-310",
  publisher = "Springer",
  series = "Lecture Notes in Computer Science",
  volume = "5126",
  doi = "10.1007/978-3-540-70583-3_25",
}