@article{Nelson_1980,
    doi = {10.1145/322186.322198},
    url = {https://doi.org/10.1145%2F322186.322198},
    year = {1980},
    month = {apr},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {27},
    number = {2},
    pages = {356--364},
    author = {Greg Nelson and Derek C. Oppen},
    title = {Fast Decision Procedures Based on Congruence Closure},
    journal = {Journal of the {ACM}}
}

@article{Nelson_1980, doi = {10.1145/322186.322198}, url = {https://doi.org/10.1145%2F322186.322198}, year = {1980}, month = {apr}, publisher = {Association for Computing Machinery ({ACM})}, volume = {27}, number = {2}, pages = {356--364}, author = {Greg Nelson and Derek C. Oppen}, title = {Fast Decision Procedures Based on Congruence Closure}, journal = {Journal of the {ACM}} }