@incollection{Letouzey_2003,
    doi = {10.1007/3-540-39185-1_12},
    url = {https://doi.org/10.1007%2F3-540-39185-1_12},
    year = {2003},
    publisher = {Springer Berlin Heidelberg},
    pages = {200--219},
    author = {Pierre Letouzey},
    title = {A New Extraction for Coq},
    booktitle = {Lecture Notes in Computer Science}
}

@incollection{Letouzey_2003, doi = {10.1007/3-540-39185-1_12}, url = {https://doi.org/10.1007%2F3-540-39185-1_12}, year = {2003}, publisher = {Springer Berlin Heidelberg}, pages = {200--219}, author = {Pierre Letouzey}, title = {A New Extraction for Coq}, booktitle = {Lecture Notes in Computer Science} }