@article{Cobham_1972,
    doi = {10.1007/bf01706087},
    url = {https://doi.org/10.1007%2Fbf01706087},
    year = {1972},
    month = {mar},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {6},
    number = {1-2},
    pages = {164--192},
    author = {Alan Cobham},
    title = {Uniform tag sequences},
    journal = {Mathematical Systems Theory}
}

@article{Cobham_1972, doi = {10.1007/bf01706087}, url = {https://doi.org/10.1007%2Fbf01706087}, year = {1972}, month = {mar}, publisher = {Springer Science and Business Media {LLC}}, volume = {6}, number = {1-2}, pages = {164--192}, author = {Alan Cobham}, title = {Uniform tag sequences}, journal = {Mathematical Systems Theory} }