@article{Thompson_1968,
    doi = {10.1145/363347.363387},
    url = {https://doi.org/10.1145%2F363347.363387},
    year = {1968},
    month = {jun},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {11},
    number = {6},
    pages = {419--422},
    author = {Ken Thompson},
    title = {Programming Techniques: Regular expression search algorithm},
    journal = {Communications of the {ACM}}
}

@article{Thompson_1968, doi = {10.1145/363347.363387}, url = {https://doi.org/10.1145%2F363347.363387}, year = {1968}, month = {jun}, publisher = {Association for Computing Machinery ({ACM})}, volume = {11}, number = {6}, pages = {419--422}, author = {Ken Thompson}, title = {Programming Techniques: Regular expression search algorithm}, journal = {Communications of the {ACM}} }