@article{Ginsburg_1962,
    doi = {10.1145/321127.321132},
    url = {https://doi.org/10.1145%2F321127.321132},
    year = {1962},
    month = {jul},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {9},
    number = {3},
    pages = {350--371},
    author = {Seymour Ginsburg and H. Gordon Rice},
    title = {Two Families of Languages Related to {ALGOL}},
    journal = {Journal of the {ACM}}
}

@article{Ginsburg_1962, doi = {10.1145/321127.321132}, url = {https://doi.org/10.1145%2F321127.321132}, year = {1962}, month = {jul}, publisher = {Association for Computing Machinery ({ACM})}, volume = {9}, number = {3}, pages = {350--371}, author = {Seymour Ginsburg and H. Gordon Rice}, title = {Two Families of Languages Related to {ALGOL}}, journal = {Journal of the {ACM}} }