@article{Jones_1977,
    doi = {10.1016/0020-0190(77)90022-9},
    url = {https://doi.org/10.1016%2F0020-0190%2877%2990022-9},
    year = {1977},
    month = {aug},
    publisher = {Elsevier {BV}},
    volume = {6},
    number = {4},
    pages = {110--112},
    author = {Neil D. Jones},
    title = {A note on linear time simulation of deterministic two-way pushdown automata},
    journal = {Information Processing Letters}
}

@article{Jones_1977, doi = {10.1016/0020-0190(77)90022-9}, url = {https://doi.org/10.1016%2F0020-0190%2877%2990022-9}, year = {1977}, month = {aug}, publisher = {Elsevier {BV}}, volume = {6}, number = {4}, pages = {110--112}, author = {Neil D. Jones}, title = {A note on linear time simulation of deterministic two-way pushdown automata}, journal = {Information Processing Letters} }