@article{Mix_Barrington_2005,
    doi = {10.1016/j.jcss.2004.07.004},
    url = {https://doi.org/10.1016%2Fj.jcss.2004.07.004},
    year = {2005},
    month = {mar},
    publisher = {Elsevier {BV}},
    volume = {70},
    number = {2},
    pages = {101--127},
    author = {David A. Mix Barrington and Neil Immerman and Clemens Lautemann and Nicole Schweikardt and Denis Th{\'{e}}rien},
    title = {First-order expressibility of languages with neutral letters or: The Crane Beach conjecture},
    journal = {Journal of Computer and System Sciences}
}

@article{Mix_Barrington_2005, doi = {10.1016/j.jcss.2004.07.004}, url = {https://doi.org/10.1016%2Fj.jcss.2004.07.004}, year = {2005}, month = {mar}, publisher = {Elsevier {BV}}, volume = {70}, number = {2}, pages = {101--127}, author = {David A. Mix Barrington and Neil Immerman and Clemens Lautemann and Nicole Schweikardt and Denis Th{\'{e}}rien}, title = {First-order expressibility of languages with neutral letters or: The Crane Beach conjecture}, journal = {Journal of Computer and System Sciences} }