@article{Katsura_1993,
    title = {The shuffle algebra and its derivations},
    volume = {115},
    issn = {0304-3975},
    url = {http://dx.doi.org/10.1016/0304-3975(93)90124-C},
    doi = {10.1016/0304-3975(93)90124-c},
    number = {2},
    journal = {Theoretical Computer Science},
    publisher = {Elsevier BV},
    author = {Katsura, Masashi and Kobayashi, Yuji},
    year = {1993},
    month = {jul},
    pages = {359–369},
    date-added = {2025-7-3 7:19:17 +0100}
}

@article{Katsura_1993, title = {The shuffle algebra and its derivations}, volume = {115}, issn = {0304-3975}, url = {http://dx.doi.org/10.1016/0304-3975(93)90124-C}, doi = {10.1016/0304-3975(93)90124-c}, number = {2}, journal = {Theoretical Computer Science}, publisher = {Elsevier BV}, author = {Katsura, Masashi and Kobayashi, Yuji}, year = {1993}, month = {jul}, pages = {359–369}, date-added = {2025-7-3 7:19:17 +0100} }