@article{Laskowski_1992,
    doi = {10.1112/jlms/s2-45.2.377},
    url = {https://doi.org/10.1112%2Fjlms%2Fs2-45.2.377},
    year = {1992},
    month = {apr},
    publisher = {Wiley},
    volume = {s2-45},
    number = {2},
    pages = {377--384},
    author = {Michael C. Laskowski},
    title = {Vapnik-Chervonenkis Classes of Definable Sets},
    journal = {Journal of the London Mathematical Society}
}

@article{Laskowski_1992, doi = {10.1112/jlms/s2-45.2.377}, url = {https://doi.org/10.1112%2Fjlms%2Fs2-45.2.377}, year = {1992}, month = {apr}, publisher = {Wiley}, volume = {s2-45}, number = {2}, pages = {377--384}, author = {Michael C. Laskowski}, title = {Vapnik-Chervonenkis Classes of Definable Sets}, journal = {Journal of the London Mathematical Society} }