@misc{cryptoeprint:2016:545,
    author = {Aggelos Kiayias and Giorgos Panagiotakos},
    title = {On Trees, Chains and Fast Transactions in the Blockchain},
    howpublished = {Cryptology ePrint Archive, Report 2016/545},
    year = {2016},
    url = {https://eprint.iacr.org/2016/545},
}