@Inproceedings{EPTCS95.14,
  author    = {Lang, Alex and Coecke, Bob},
  year      = {2012},
  title     = {Trichromatic Open Digraphs for Understanding Qubits},
  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     = {193-209},
  doi       = {10.4204/EPTCS.95.14},
}