@article{Post_1919,
    doi = {10.2307/1967871},
    url = {https://doi.org/10.2307%2F1967871},
    year = {1919},
    month = {mar},
    publisher = {{JSTOR}},
    volume = {20},
    number = {3},
    pages = {202},
    author = {Emil L. Post},
    title = {The Generalized Gamma Functions},
    journal = {The Annals of Mathematics}
}

@article{Post_1919, doi = {10.2307/1967871}, url = {https://doi.org/10.2307%2F1967871}, year = {1919}, month = {mar}, publisher = {{JSTOR}}, volume = {20}, number = {3}, pages = {202}, author = {Emil L. Post}, title = {The Generalized Gamma Functions}, journal = {The Annals of Mathematics} }