@article{Deliguoro_1995,
    doi = {10.1006/inco.1995.1145},
    url = {https://doi.org/10.1006%2Finco.1995.1145},
    year = {1995},
    month = {nov},
    publisher = {Elsevier {BV}},
    volume = {122},
    number = {2},
    pages = {149--177},
    author = {U. Deliguoro and A. Piperno},
    title = {Nondeterministic Extensions of Untyped {$\lambda$}-Calculus},
    journal = {Information and Computation}
}

@article{Deliguoro_1995, doi = {10.1006/inco.1995.1145}, url = {https://doi.org/10.1006%2Finco.1995.1145}, year = {1995}, month = {nov}, publisher = {Elsevier {BV}}, volume = {122}, number = {2}, pages = {149--177}, author = {U. Deliguoro and A. Piperno}, title = {Nondeterministic Extensions of Untyped {$\lambda$}-Calculus}, journal = {Information and Computation} }