@misc{cryptoeprint:2018:183,
    author = {Bram Cohen and Krzysztof Pietrzak},
    title = {Simple Proofs of Sequential Work},
    howpublished = {Cryptology ePrint Archive, Report 2018/183},
    year = {2018},
    url = {https://eprint.iacr.org/2018/183},
}