@article{Pighizzini_2013,
    doi = {10.3233/fi-2013-879},
    url = {https://doi.org/10.3233%2Ffi-2013-879},
    year = {2013},
    publisher = {{IOS} Press},
    volume = {126},
    number = {2-3},
    pages = {225--246},
    author = {Giovanni Pighizzini},
    title = {Two-Way Finite Automata: Old and Recent Results},
    journal = {Fundamenta Informaticae}
}

@article{Pighizzini_2013, doi = {10.3233/fi-2013-879}, url = {https://doi.org/10.3233%2Ffi-2013-879}, year = {2013}, publisher = {{IOS} Press}, volume = {126}, number = {2-3}, pages = {225--246}, author = {Giovanni Pighizzini}, title = {Two-Way Finite Automata: Old and Recent Results}, journal = {Fundamenta Informaticae} }