@incollection{Joyal_1986,
    doi = {10.1007/bfb0072514},
    url = {https://doi.org/10.1007%2Fbfb0072514},
    year = {1986},
    publisher = {Springer Berlin Heidelberg},
    pages = {126--159},
    author = {Andr{\'{e}} Joyal},
    title = {Foncteurs analytiques et esp{\`{e}}ces de structures},
    booktitle = {Combinatoire {\'{e}}num{\'{e}}rative}
}

@incollection{Joyal_1986, doi = {10.1007/bfb0072514}, url = {https://doi.org/10.1007%2Fbfb0072514}, year = {1986}, publisher = {Springer Berlin Heidelberg}, pages = {126--159}, author = {Andr{\'{e}} Joyal}, title = {Foncteurs analytiques et esp{`{e}}ces de structures}, booktitle = {Combinatoire {\'{e}}num{\'{e}}rative} }