@article{Russell_1907,
    doi = {10.1112/plms/s2-4.1.29},
    url = {https://doi.org/10.1112%2Fplms%2Fs2-4.1.29},
    year = {1907},
    publisher = {Wiley},
    volume = {s2-4},
    number = {1},
    pages = {29--53},
    author = {B. Russell},
    title = {On Some Difficulties in the Theory of Transfinite Numbers and Order Types},
    journal = {Proceedings of the London Mathematical Society}
}

@article{Russell_1907, doi = {10.1112/plms/s2-4.1.29}, url = {https://doi.org/10.1112%2Fplms%2Fs2-4.1.29}, year = {1907}, publisher = {Wiley}, volume = {s2-4}, number = {1}, pages = {29--53}, author = {B. Russell}, title = {On Some Difficulties in the Theory of Transfinite Numbers and Order Types}, journal = {Proceedings of the London Mathematical Society} }