@inproceedings{Asperti_2000,
    doi = {10.1145/325694.325707},
    url = {https://doi.org/10.1145%2F325694.325707},
    year = {2000},
    month = {jan},
    publisher = {{ACM}},
    author = {Andrea Asperti and Paolo Coppola and Simone Martini},
    title = {(Optimal) duplication is not elementary recursive},
    booktitle = {Proceedings of the 27th {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages}
}

@inproceedings{Asperti_2000, doi = {10.1145/325694.325707}, url = {https://doi.org/10.1145%2F325694.325707}, year = {2000}, month = {jan}, publisher = {{ACM}}, author = {Andrea Asperti and Paolo Coppola and Simone Martini}, title = {(Optimal) duplication is not elementary recursive}, booktitle = {Proceedings of the 27th {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages} }