@Inproceedings{EPTCS158.1,
  author    = {Coecke, Bob and Heunen, Chris and Kissinger, Aleks},
  year      = {2014},
  title     = {Categories of Quantum and Classical Channels (extended abstract)},
  editor    = {Duncan, Ross and Panangaden, Prakash},
  booktitle = {{\rm Proceedings 9th Workshop on}
               Quantum Physics and Logic,
               {\rm Brussels,  Belgium, 10-12 October 2012}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {158},
  publisher = {Open Publishing Association},
  pages     = {1-14},
  doi       = {10.4204/EPTCS.158.1},
}