@article{doi:10.1137/0218073,
    Author = {Ladner, Richard E.},
    EPrint = {https://doi.org/10.1137/0218073},
    File = {Polynomial Space Counting Problems - ladner1989.pdf},
    Journal = {SIAM Journal on Computing},
    Number = {6},
    Pages = {1087-1097},
    Title = {Polynomial Space Counting Problems},
    URL = {https://doi.org/10.1137/0218073},
    Volume = {18},
    Year = {1989},
    bdsk-url-1 = {https://doi.org/10.1137/0218073},
    date-added = {2021-11-23 14:39:24 +0100},
    date-modified = {2021-11-23 14:39:24 +0100},
    doi = {10.1137/0218073}
}

@article{doi:10.1137/0218073, Author = {Ladner, Richard E.}, EPrint = {https://doi.org/10.1137/0218073}, File = {Polynomial Space Counting Problems - ladner1989.pdf}, Journal = {SIAM Journal on Computing}, Number = {6}, Pages = {1087-1097}, Title = {Polynomial Space Counting Problems}, URL = {https://doi.org/10.1137/0218073}, Volume = {18}, Year = {1989}, bdsk-url-1 = {https://doi.org/10.1137/0218073}, date-added = {2021-11-23 14:39:24 +0100}, date-modified = {2021-11-23 14:39:24 +0100}, doi = {10.1137/0218073} }