@article{Williams_1975,
    doi = {10.1016/s0019-9958(75)90330-7},
    url = {https://doi.org/10.1016%2Fs0019-9958%2875%2990330-7},
    year = {1975},
    month = {aug},
    publisher = {Elsevier {BV}},
    volume = {28},
    number = {4},
    pages = {314--334},
    author = {John H. Williams},
    title = {Bounded context parsable grammars},
    journal = {Information and Control}
}

@article{Williams_1975, doi = {10.1016/s0019-9958(75)90330-7}, url = {https://doi.org/10.1016%2Fs0019-9958%2875%2990330-7}, year = {1975}, month = {aug}, publisher = {Elsevier {BV}}, volume = {28}, number = {4}, pages = {314--334}, author = {John H. Williams}, title = {Bounded context parsable grammars}, journal = {Information and Control} }