@incollection{Graf_1997,
    doi = {10.1007/3-540-63166-6_10},
    url = {https://doi.org/10.1007%2F3-540-63166-6_10},
    year = {1997},
    publisher = {Springer Berlin Heidelberg},
    pages = {72--83},
    author = {Susanne Graf and Hassen Saidi},
    title = {Construction of abstract state graphs with {PVS}},
    booktitle = {Computer Aided Verification}
}

@incollection{Graf_1997, doi = {10.1007/3-540-63166-6_10}, url = {https://doi.org/10.1007%2F3-540-63166-6_10}, year = {1997}, publisher = {Springer Berlin Heidelberg}, pages = {72--83}, author = {Susanne Graf and Hassen Saidi}, title = {Construction of abstract state graphs with {PVS}}, booktitle = {Computer Aided Verification} }