@article{Fox:AM:1953,
    title = {{Free Differential Calculus. I: Derivation in the Free Group Ring}},
    volume = {57},
    issn = {0003-486X},
    url = {http://dx.doi.org/10.2307/1969736},
    doi = {10.2307/1969736},
    number = {3},
    journal = {The Annals of Mathematics},
    publisher = {JSTOR},
    author = {Fox, Ralph H.},
    year = {1953},
    month = {may},
    pages = {547},
    date-added = {2024-12-16 15:30:33 +0100}
}

@article{Fox:AM:1953, title = {{Free Differential Calculus. I: Derivation in the Free Group Ring}}, volume = {57}, issn = {0003-486X}, url = {http://dx.doi.org/10.2307/1969736}, doi = {10.2307/1969736}, number = {3}, journal = {The Annals of Mathematics}, publisher = {JSTOR}, author = {Fox, Ralph H.}, year = {1953}, month = {may}, pages = {547}, date-added = {2024-12-16 15:30:33 +0100} }