@article{Thomas_1979,
    doi = {10.1016/s0019-9958(79)90629-6},
    url = {https://doi.org/10.1016%2Fs0019-9958%2879%2990629-6},
    year = {1979},
    month = {aug},
    publisher = {Elsevier {BV}},
    volume = {42},
    number = {2},
    pages = {148--156},
    author = {Wolfgang Thomas},
    title = {Star-free regular sets of {$\omega$}-sequences},
    journal = {Information and Control}
}

@article{Thomas_1979, doi = {10.1016/s0019-9958(79)90629-6}, url = {https://doi.org/10.1016%2Fs0019-9958%2879%2990629-6}, year = {1979}, month = {aug}, publisher = {Elsevier {BV}}, volume = {42}, number = {2}, pages = {148--156}, author = {Wolfgang Thomas}, title = {Star-free regular sets of {$\omega$}-sequences}, journal = {Information and Control} }