@misc{cryptoeprint:2016:145,
    author = {Jeremiah Blocki and Hong-Sheng Zhou},
    title = {Designing Proof of Human-work Puzzles for Cryptocurrency and Beyond},
    howpublished = {Cryptology ePrint Archive, Report 2016/145},
    year = {2016},
    url = {https://eprint.iacr.org/2016/145},
}