@misc{cryptoeprint:2007:433,
    author = {Fabien Coelho},
    title = {An (Almost) Constant-Effort Solution-Verification Proof-of-Work Protocol based on Merkle Trees},
    howpublished = {Cryptology ePrint Archive, Report 2007/433},
    year = {2007},
    url = {http://eprint.iacr.org/2007/433},
}