Bob Coecke, Chris Heunen. Pictures of complete positivity in arbitrary dimension. Inf. Comput., 250:50-58, 2016. [doi]
@article{CoeckeH16,
title = {Pictures of complete positivity in arbitrary dimension},
author = {Bob Coecke and Chris Heunen},
year = {2016},
doi = {10.1016/j.ic.2016.02.007},
url = {http://dx.doi.org/10.1016/j.ic.2016.02.007},
researchr = {https://researchr.org/publication/CoeckeH16},
cites = {0},
citedby = {0},
journal = {Inf. Comput.},
volume = {250},
pages = {50-58},
}