@article{Okhotin_2008,
    doi = {10.1016/j.ic.2008.03.023},
    url = {https://doi.org/10.1016%2Fj.ic.2008.03.023},
    year = {2008},
    month = {sep},
    publisher = {Elsevier {BV}},
    volume = {206},
    number = {9-10},
    pages = {1234--1247},
    author = {Alexander Okhotin},
    title = {Unambiguous Boolean grammars},
    journal = {Information and Computation}
}

@article{Okhotin_2008, doi = {10.1016/j.ic.2008.03.023}, url = {https://doi.org/10.1016%2Fj.ic.2008.03.023}, year = {2008}, month = {sep}, publisher = {Elsevier {BV}}, volume = {206}, number = {9-10}, pages = {1234--1247}, author = {Alexander Okhotin}, title = {Unambiguous Boolean grammars}, journal = {Information and Computation} }