@incollection{Aspinall_2000,
    doi = {10.1007/3-540-46419-0_3},
    url = {https://doi.org/10.1007%2F3-540-46419-0_3},
    year = {2000},
    publisher = {Springer Berlin Heidelberg},
    pages = {38--43},
    author = {David Aspinall},
    title = {Proof General: A Generic Tool for Proof Development},
    booktitle = {Tools and Algorithms for the Construction and Analysis of Systems}
}

@incollection{Aspinall_2000, doi = {10.1007/3-540-46419-0_3}, url = {https://doi.org/10.1007%2F3-540-46419-0_3}, year = {2000}, publisher = {Springer Berlin Heidelberg}, pages = {38--43}, author = {David Aspinall}, title = {Proof General: A Generic Tool for Proof Development}, booktitle = {Tools and Algorithms for the Construction and Analysis of Systems} }