@inproceedings{Jansson_1997,
    doi = {10.1145/263699.263763},
    url = {https://doi.org/10.1145%2F263699.263763},
    year = {1997},
    publisher = {{ACM} Press},
    author = {Patrik Jansson and Johan Jeuring},
    title = {{PolyP}---a polytypic programming language extension},
    booktitle = {Proceedings of the 24th {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages  - {POPL} {\textquotesingle}97}
}

@inproceedings{Jansson_1997, doi = {10.1145/263699.263763}, url = {https://doi.org/10.1145%2F263699.263763}, year = {1997}, publisher = {{ACM} Press}, author = {Patrik Jansson and Johan Jeuring}, title = {{PolyP}---a polytypic programming language extension}, booktitle = {Proceedings of the 24th {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages - {POPL} {\textquotesingle}97} }