@article{Esparza_2011,
    doi = {10.1016/j.ipl.2011.03.019},
    url = {https://doi.org/10.1016%2Fj.ipl.2011.03.019},
    year = {2011},
    month = {jun},
    publisher = {Elsevier {BV}},
    volume = {111},
    number = {12},
    pages = {614--619},
    author = {Javier Esparza and Pierre Ganty and Stefan Kiefer and Michael Luttenberger},
    title = {Parikh's theorem: A simple and direct automaton construction},
    journal = {Information Processing Letters}
}

@article{Esparza_2011, doi = {10.1016/j.ipl.2011.03.019}, url = {https://doi.org/10.1016%2Fj.ipl.2011.03.019}, year = {2011}, month = {jun}, publisher = {Elsevier {BV}}, volume = {111}, number = {12}, pages = {614--619}, author = {Javier Esparza and Pierre Ganty and Stefan Kiefer and Michael Luttenberger}, title = {Parikh's theorem: A simple and direct automaton construction}, journal = {Information Processing Letters} }