@article{gibbons-2018-relational, title={Relational algebra by way of adjunctions}, volume={2}, ISSN={2475-1421}, url={http://dx.doi.org/10.1145/3236781}, DOI={10.1145/3236781}, number={ICFP}, journal={Proceedings of the ACM on Programming Languages}, publisher={Association for Computing Machinery (ACM)}, author={Gibbons, Jeremy and Henglein, Fritz and Hinze, Ralf and Wu, Nicolas}, year={2018}, month=July, pages={1–28} }