@Inproceedings{EPTCS318.4, author = {Zapata, Octavio}, year = {2020}, title = {Effectus of Quantum Probability on Relational Structures}, editor = {Coecke, Bob and Leifer, Matthew}, booktitle = {{\rm Proceedings 16th International Conference on} Quantum Physics and Logic, {\rm Chapman University, Orange, CA, USA., 10-14 June 2019}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {318}, publisher = {Open Publishing Association}, pages = {53-65}, doi = {10.4204/EPTCS.318.4}, }