@article{Hartmanis_1972,
    doi = {10.1007/bf00289513},
    url = {https://doi.org/10.1007%2Fbf00289513},
    year = {1972},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {1},
    number = {4},
    pages = {336--344},
    author = {Juris Hartmanis},
    title = {On non-determinancy in simple computing devices},
    journal = {Acta Informatica}
}

@article{Hartmanis_1972, doi = {10.1007/bf00289513}, url = {https://doi.org/10.1007%2Fbf00289513}, year = {1972}, publisher = {Springer Science and Business Media {LLC}}, volume = {1}, number = {4}, pages = {336--344}, author = {Juris Hartmanis}, title = {On non-determinancy in simple computing devices}, journal = {Acta Informatica} }