@article{Engelfriet_2001,
    doi = {10.1145/371316.371512},
    url = {https://doi.org/10.1145%2F371316.371512},
    year = {2001},
    month = {apr},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {2},
    number = {2},
    pages = {216--254},
    author = {Joost Engelfriet and Hendrik Jan Hoogeboom},
    title = {{MSO} definable string transductions and two-way finite-state transducers},
    journal = {{ACM} Transactions on Computational Logic}
}

@article{Engelfriet_2001, doi = {10.1145/371316.371512}, url = {https://doi.org/10.1145%2F371316.371512}, year = {2001}, month = {apr}, publisher = {Association for Computing Machinery ({ACM})}, volume = {2}, number = {2}, pages = {216--254}, author = {Joost Engelfriet and Hendrik Jan Hoogeboom}, title = {{MSO} definable string transductions and two-way finite-state transducers}, journal = {{ACM} Transactions on Computational Logic} }