@article{Kao_2009,
    doi = {10.1016/j.tcs.2009.07.049},
    url = {https://doi.org/10.1016%2Fj.tcs.2009.07.049},
    year = {2009},
    month = {nov},
    publisher = {Elsevier {BV}},
    volume = {410},
    number = {47-49},
    pages = {5010--5021},
    author = {Jui-Yi Kao and Narad Rampersad and Jeffrey Shallit},
    title = {On {NFAs} where all states are final, initial, or both},
    journal = {Theoretical Computer Science}
}

@article{Kao_2009, doi = {10.1016/j.tcs.2009.07.049}, url = {https://doi.org/10.1016%2Fj.tcs.2009.07.049}, year = {2009}, month = {nov}, publisher = {Elsevier {BV}}, volume = {410}, number = {47-49}, pages = {5010--5021}, author = {Jui-Yi Kao and Narad Rampersad and Jeffrey Shallit}, title = {On {NFAs} where all states are final, initial, or both}, journal = {Theoretical Computer Science} }