@article{Dulucq_2002,
    doi = {10.1016/s0012-365x(02)00342-4},
    url = {https://doi.org/10.1016%2Fs0012-365x%2802%2900342-4},
    year = {2002},
    month = {oct},
    publisher = {Elsevier {BV}},
    volume = {256},
    number = {3},
    pages = {671--676},
    author = {Serge Dulucq and Jean-Guy Penaud},
    title = {Interpr{\'{e}}tation bijective d{\textquotesingle}une r{\'{e}}currence des nombres de Motzkin},
    journal = {Discrete Mathematics}
}

@article{Dulucq_2002, doi = {10.1016/s0012-365x(02)00342-4}, url = {https://doi.org/10.1016%2Fs0012-365x%2802%2900342-4}, year = {2002}, month = {oct}, publisher = {Elsevier {BV}}, volume = {256}, number = {3}, pages = {671--676}, author = {Serge Dulucq and Jean-Guy Penaud}, title = {Interpr{\'{e}}tation bijective d{\textquotesingle}une r{\'{e}}currence des nombres de Motzkin}, journal = {Discrete Mathematics} }