@inbook{Duncan:2009cs,
  title = "Generalised Proof-Nets for Compact Categories with Biproducts",
  author = "Ross Duncan",
  year = "2009",
  booktitle = "Semantics of Quantum Computation",
  editor = "S. Gay and I. Mackie",
  keywords = "categorical quantum mechanics; compact closed categories; proof-nets; quantum computing",
  note = "Preprint available at http://arxiv.org/abs/0903.5154",
  publisher = "Cambridge University Press",
}