@article{Elgueta_2021,
    doi = {10.1016/j.jpaa.2021.106738},
    url = {https://doi.org/10.1016%2Fj.jpaa.2021.106738},
    year = {2021},
    month = {nov},
    publisher = {Elsevier {BV}},
    volume = {225},
    number = {11},
    pages = {106738},
    author = {Josep Elgueta},
    title = {The groupoid of finite sets is biinitial in the 2-category of rig categories},
    journal = {Journal of Pure and Applied Algebra}
}

@article{Elgueta_2021, doi = {10.1016/j.jpaa.2021.106738}, url = {https://doi.org/10.1016%2Fj.jpaa.2021.106738}, year = {2021}, month = {nov}, publisher = {Elsevier {BV}}, volume = {225}, number = {11}, pages = {106738}, author = {Josep Elgueta}, title = {The groupoid of finite sets is biinitial in the 2-category of rig categories}, journal = {Journal of Pure and Applied Algebra} }