@incollection{Berghofer_1999,
    doi = {10.1007/3-540-48256-3_3},
    url = {https://doi.org/10.1007%2F3-540-48256-3_3},
    year = {1999},
    publisher = {Springer Berlin Heidelberg},
    pages = {19--36},
    author = {Stefan Berghofer and Markus Wenzel},
    title = {Inductive Datatypes in {HOL} - Lessons Learned in Formal-Logic Engineering},
    booktitle = {Lecture Notes in Computer Science}
}

@incollection{Berghofer_1999, doi = {10.1007/3-540-48256-3_3}, url = {https://doi.org/10.1007%2F3-540-48256-3_3}, year = {1999}, publisher = {Springer Berlin Heidelberg}, pages = {19--36}, author = {Stefan Berghofer and Markus Wenzel}, title = {Inductive Datatypes in {HOL} - Lessons Learned in Formal-Logic Engineering}, booktitle = {Lecture Notes in Computer Science} }