@misc{cryptoeprint:2020:1262,
    author = {Paolo D'Arco and Francesco Mogavero},
    title = {On (multi-stage) Proof-of-Work blockchain protocols},
    howpublished = {Cryptology ePrint Archive, Report 2020/1262},
    year = {2020},
    url = {https://eprint.iacr.org/2020/1262},
}