@inproceedings{Delaware_2011,
    doi = {10.1145/2048066.2048113},
    url = {https://doi.org/10.1145%2F2048066.2048113},
    year = {2011},
    month = {oct},
    publisher = {{ACM}},
    author = {Benjamin Delaware and William Cook and Don Batory},
    title = {Product lines of theorems},
    booktitle = {Proceedings of the 2011 {ACM} international conference on Object oriented programming systems languages and applications}
}

@inproceedings{Delaware_2011, doi = {10.1145/2048066.2048113}, url = {https://doi.org/10.1145%2F2048066.2048113}, year = {2011}, month = {oct}, publisher = {{ACM}}, author = {Benjamin Delaware and William Cook and Don Batory}, title = {Product lines of theorems}, booktitle = {Proceedings of the 2011 {ACM} international conference on Object oriented programming systems languages and applications} }