@article{Berghofer_2007,
    doi = {10.1016/j.entcs.2007.01.018},
    url = {https://doi.org/10.1016%2Fj.entcs.2007.01.018},
    year = {2007},
    month = {jun},
    publisher = {Elsevier {BV}},
    volume = {174},
    number = {5},
    pages = {53--67},
    author = {Stefan Berghofer and Christian Urban},
    title = {A Head-to-Head Comparison of de Bruijn Indices and Names},
    journal = {Electronic Notes in Theoretical Computer Science}
}

@article{Berghofer_2007, doi = {10.1016/j.entcs.2007.01.018}, url = {https://doi.org/10.1016%2Fj.entcs.2007.01.018}, year = {2007}, month = {jun}, publisher = {Elsevier {BV}}, volume = {174}, number = {5}, pages = {53--67}, author = {Stefan Berghofer and Christian Urban}, title = {A Head-to-Head Comparison of de Bruijn Indices and Names}, journal = {Electronic Notes in Theoretical Computer Science} }