@article{Wirth_1966,
    doi = {10.1145/365153.365162},
    url = {https://doi.org/10.1145%2F365153.365162},
    year = {1966},
    month = {jan},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {9},
    number = {1},
    pages = {13--25},
    author = {Niklaus Wirth and Helmut Weber},
    title = {{EULER}: A generalization of {ALGOL} and its formal definition: Part 1},
    journal = {Communications of the {ACM}}
}

@article{Wirth_1966, doi = {10.1145/365153.365162}, url = {https://doi.org/10.1145%2F365153.365162}, year = {1966}, month = {jan}, publisher = {Association for Computing Machinery ({ACM})}, volume = {9}, number = {1}, pages = {13--25}, author = {Niklaus Wirth and Helmut Weber}, title = {{EULER}: A generalization of {ALGOL} and its formal definition: Part 1}, journal = {Communications of the {ACM}} }