Joseph A. Goguen, Rod M. Burstall. Some Fundamental Algebraic Tools for the Semantics of Computation. Part 1: Comma Categories, Colimits, Signatures and Theories. Theoretical Computer Science, 31:175-209, 1984.
@article{GoguenB84, title = {Some Fundamental Algebraic Tools for the Semantics of Computation. Part 1: Comma Categories, Colimits, Signatures and Theories}, author = {Joseph A. Goguen and Rod M. Burstall}, year = {1984}, tags = {semantics, algebra}, researchr = {https://researchr.org/publication/GoguenB84}, cites = {0}, citedby = {0}, journal = {Theoretical Computer Science}, volume = {31}, pages = {175-209}, }