@article{Hyland_2007,
    doi = {10.1016/j.entcs.2007.02.019},
    url = {https://doi.org/10.1016%2Fj.entcs.2007.02.019},
    year = {2007},
    month = {apr},
    publisher = {Elsevier {BV}},
    volume = {172},
    pages = {437--458},
    author = {Martin Hyland and John Power},
    title = {The Category Theoretic Understanding of Universal Algebra: Lawvere Theories and Monads},
    journal = {Electronic Notes in Theoretical Computer Science}
}

@article{Hyland_2007, doi = {10.1016/j.entcs.2007.02.019}, url = {https://doi.org/10.1016%2Fj.entcs.2007.02.019}, year = {2007}, month = {apr}, publisher = {Elsevier {BV}}, volume = {172}, pages = {437--458}, author = {Martin Hyland and John Power}, title = {The Category Theoretic Understanding of Universal Algebra: Lawvere Theories and Monads}, journal = {Electronic Notes in Theoretical Computer Science} }