@Inproceedings{EPTCS95.4,
  author    = {Coecke, Bob and Heunen, Chris},
  year      = {2012},
  title     = {Pictures of complete positivity in arbitrary dimension},
  editor    = {Jacobs, Bart and Selinger, Peter and Spitters, Bas},
  booktitle = {{\rm Proceedings 8th International Workshop on}
               Quantum Physics and Logic,
               {\rm Nijmegen, Netherlands, October 27-29, 2011}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {95},
  publisher = {Open Publishing Association},
  pages     = {27-35},
  doi       = {10.4204/EPTCS.95.4},
}