@inproceedings{Mackie_1995,
    doi = {10.1145/199448.199483},
    url = {https://doi.org/10.1145%2F199448.199483},
    year = {1995},
    publisher = {{ACM} Press},
    author = {Ian Mackie},
    title = {The geometry of interaction machine},
    booktitle = {Proceedings of the 22nd {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages  - {POPL} {\textquotesingle}95}
}

@inproceedings{Mackie_1995, doi = {10.1145/199448.199483}, url = {https://doi.org/10.1145%2F199448.199483}, year = {1995}, publisher = {{ACM} Press}, author = {Ian Mackie}, title = {The geometry of interaction machine}, booktitle = {Proceedings of the 22nd {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages - {POPL} {\textquotesingle}95} }