@article{Barthelemy_1980,
    doi = {10.1016/0012-365x(80)90159-4},
    url = {https://doi.org/10.1016%2F0012-365x%2880%2990159-4},
    year = {1980},
    publisher = {Elsevier {BV}},
    volume = {29},
    number = {3},
    pages = {311--313},
    author = {J.P. Barthelemy},
    title = {An asymptotic equivalent for the number of total preorders on a finite set},
    journal = {Discrete Mathematics}
}

@article{Barthelemy_1980, doi = {10.1016/0012-365x(80)90159-4}, url = {https://doi.org/10.1016%2F0012-365x%2880%2990159-4}, year = {1980}, publisher = {Elsevier {BV}}, volume = {29}, number = {3}, pages = {311--313}, author = {J.P. Barthelemy}, title = {An asymptotic equivalent for the number of total preorders on a finite set}, journal = {Discrete Mathematics} }