@article{Labelle_1990,
    doi = {10.1016/0012-365x(90)90336-g},
    url = {https://doi.org/10.1016%2F0012-365x%2890%2990336-g},
    year = {1990},
    month = {feb},
    publisher = {Elsevier {BV}},
    volume = {79},
    number = {3},
    pages = {279--297},
    author = {Gilbert Labelle},
    title = {D{\'{e}}riv{\'{e}}es directionnelles et d{\'{e}}veloppements de Taylor combinatoires},
    journal = {Discrete Mathematics}
}

@article{Labelle_1990, doi = {10.1016/0012-365x(90)90336-g}, url = {https://doi.org/10.1016%2F0012-365x%2890%2990336-g}, year = {1990}, month = {feb}, publisher = {Elsevier {BV}}, volume = {79}, number = {3}, pages = {279--297}, author = {Gilbert Labelle}, title = {D{\'{e}}riv{\'{e}}es directionnelles et d{\'{e}}veloppements de Taylor combinatoires}, journal = {Discrete Mathematics} }