@article(ashoush,
 author       = {D. Ashoush and B. Coecke},
 year         = {2016},
 title        = {Dual Density Operators and Natural Language Meaning},
 journal      = {EPTCS},
 volume       = {221},
 pages        = {1--10},
 doi          = {10.4204/EPTCS.221.1},
)
@article(chiribella_purification,
 author       = {G. Chiribella and G. M. D'Ariano and P. Perinotti},
 year         = {2010},
 title        = {Probabilistic theories with purification},
 journal      = {Phys. Rev. A},
 volume       = {81},
 pages        = {062348},
 doi          = {10.1103/PhysRevA.81.062348},
)
@article(coecke_zx,
 author       = {B. Coecke and R. Duncan},
 year         = {2011},
 title        = {Interacting quantum observables: categorical algebra and diagrammatics},
 journal      = {New Journal of Physics},
 volume       = {13},
 number       = {043016},
 doi          = {10.1088/1367-2630/13/4/043016},
)
@article(coecke_double,
 author       = {B. Coecke and K. Meichanetzidis},
 year         = {2020},
 title        = {Meaning Updating of Density Matrices},
 journal      = {arXiv preprint},
 volume       = {arXiv:2001.00862v1},
)
@article(coecke_bases,
 author       = {B. Coecke and D. Pavlovic and J. Vicary},
 year         = {2013},
 title        = {A new description of orthogonal bases},
 journal      = {Mathematical Structures in Computer Science},
 volume       = {23},
 number       = {3},
 pages        = {555--567},
 doi          = {10.1017/S0960129512000047},
)
@article(coecke_environment,
 author       = {B. Coecke and S. Perdrix},
 year         = {2012},
 title        = {Environment and classical channels in categorical quantum mechanics},
 journal      = {Logical Methods in Computer Science},
 volume       = {8},
 doi          = {10.2168/LMCS-8(4:14)2012},
)
@article(coecke_classicality,
 author       = {B. Coecke and J. Selby and S. Tull},
 year         = {2018},
 title        = {Two Roads to Classicality},
 journal      = {EPTCS},
 volume       = {266},
 pages        = {104--118},
 doi          = {10.4204/EPTCS.266.7},
)
@article(coecke2016terminality,
 author       = {Bob Coecke},
 year         = {2016},
 title        = {Terminality implies no-signalling... and much more than that},
 journal      = {New Generation Computing},
 volume       = {34},
 number       = {1-2},
 pages        = {69--85},
 doi          = {10.1007/s00354-016-0201-6},
)
@article(coecke2013causal,
 author       = {Bob Coecke and Raymond Lal},
 year         = {2013},
 title        = {Causal categories: relativistically interacting processes},
 journal      = {Foundations of Physics},
 volume       = {43},
 number       = {4},
 pages        = {458--501},
 doi          = {10.1007/s10701-012-9646-8},
)
@article(density_cubes,
 author       = {B. Daki\'c and T. Paterek and \^C. Brukner},
 year         = {2014},
 title        = {Density cubes and higher-order interference theories},
 journal      = {New Journal of Physics},
 volume       = {16},
 number       = {023028},
 doi          = {10.1088/1367-2630/16/2/023028},
)
@article(gogioso_cpm,
 author       = {S. Gogioso},
 year         = {2019},
 title        = {Higher-order CPM Constructions},
 journal      = {EPTCS},
 volume       = {287},
 pages        = {145--162},
 doi          = {10.4204/EPTCS.287.8},
)
@article(gogioso_cpt,
 author       = {S. Gogioso and C. Scandolo},
 year         = {2018},
 title        = {Categorical Probabilistic Theories},
 journal      = {EPTCS},
 volume       = {266},
 pages        = {367--385},
 doi          = {10.4204/EPTCS.266.23},
)
@inproceedings(gogioso_hyper,
 author       = {S. Gogioso and C. Scandolo},
 year         = {2019},
 title        = {Density Hypercubes, Higher Order Interference and Hyper-decoherence: A Categorical Approach},
 booktitle    = {Quantum Interaction},
 publisher    = {Springer International Publishing},
 pages        = {141--160},
 doi          = {10.1007/978-3-030-35895-2\textunderscore10},
)
@article(kissinger_phasegadgets,
 author       = {A. Kissinger and J. van de Wetering},
 year         = {2019},
 title        = {Reducing T-count with the ZX-calculus},
 journal      = {arXiv preprint},
 volume       = {arXiv:1903.10477},
)
@article(lee_extensions,
 author       = {C. M. Lee and J. H. Selby},
 year         = {2017},
 title        = {Higher-Order Interference in Extensions of Quantum Theory},
 journal      = {Found Phys},
 volume       = {47},
 pages        = {89--112},
 doi          = {10.1007/s10701-016-0045-4},
)
@article(lee_nogo,
 author       = {C. M. Lee and J. H. Selby},
 year         = {2018},
 title        = {A no-go theorem for theories that decohere to quantum mechanics},
 journal      = {Proc. R. Soc. A},
 volume       = {474},
 number       = {20170732},
 doi          = {10.1098/rspa.2017.0732},
)
@article(piedeleu,
 author       = {R. Piedeleu and D. Kartsaklis and B. Coecke and M. Sadrzadeh},
 year         = {2015},
 title        = {Open System Categorical Quantum Semantics in Natural Language Processing},
 journal      = {arXiv preprint},
 volume       = {arXiv:1502.00831},
)
@article(selinger,
 author       = {P. Selinger},
 year         = {2007},
 title        = {Dagger Compact Closed Categories and Completely Positive Maps},
 journal      = {Electronic Notes in Theoretical Computer Science},
 volume       = {170},
 pages        = {139--163},
 doi          = {10.1016/j.entcs.2006.12.018},
)
@article(selinger_idempotents,
 author       = {P. Selinger},
 year         = {2008},
 title        = {Idempotents in Dagger Categories: (Extended Abstract)},
 journal      = {Electronic Notes in Theoretical Computer Science},
 volume       = {210},
 pages        = {107--122},
 doi          = {10.1016/j.entcs.2008.04.021},
)
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 author       = {R. D. Sorkin},
 year         = {1994},
 title        = {Quantum Mechanics as Quantum Measure Theory},
 journal      = {Mod. Phys. Lett. A},
 volume       = {9},
 number       = {33},
 pages        = {3119--3127},
 doi          = {10.1142/S021773239400294X},
)
@inbook(Sorkin2,
 author       = {R. D. Sorkin},
 year         = {1997},
 title        = {Quantum Classical Correspondence: The 4th Drexel Symposium on Quantum Nonintegrability},
 chapter      = {Quantum Measure Theory and its Interpretation},
 pages        = {229--251},
 publisher    = {International Press},
 address      = {Boston},
)
@article(coecke_dilation,
 author       = {M. Zwart and B. Coecke},
 year         = {2018},
 title        = {Double Dilation $\not=$ Double Mixing},
 journal      = {EPTCS},
 volume       = {266},
 pages        = {133--146},
 doi          = {10.4204/EPTCS.266.9},
)
@article(quarticquantum,
 author       = {K. \.{Z}yczkowski},
 year         = {2008},
 title        = {Quartic quantum theory: an extension of the standard quantum mechanics},
 journal      = {J. Phys. A: Math. Theor.},
 volume       = {41},
 number       = {355302},
 doi          = {10.1088/1751-8113/41/35/355302},
)