@article{Karhumaki:TCS:1977,
    title = {{Remarks on commutative N-rational series}},
    volume = {5},
    issn = {0304-3975},
    url = {http://dx.doi.org/10.1016/0304-3975(77)90008-1},
    doi = {10.1016/0304-3975(77)90008-1},
    number = {2},
    journal = {Theoretical Computer Science},
    publisher = {Elsevier BV},
    author = {Karhumäki, Juhani},
    year = {1977},
    month = {oct},
    pages = {211–217},
    date-added = {2024-12-3 8:10:54 +0100}
}

@article{Karhumaki:TCS:1977, title = {{Remarks on commutative N-rational series}}, volume = {5}, issn = {0304-3975}, url = {http://dx.doi.org/10.1016/0304-3975(77)90008-1}, doi = {10.1016/0304-3975(77)90008-1}, number = {2}, journal = {Theoretical Computer Science}, publisher = {Elsevier BV}, author = {Karhumäki, Juhani}, year = {1977}, month = {oct}, pages = {211–217}, date-added = {2024-12-3 8:10:54 +0100} }