@misc{cryptoeprint:2002:124,
    author = {Helger Lipmaa},
    title = {On Optimal Hash Tree Traversal for Interval Time-Stamping},
    howpublished = {Cryptology ePrint Archive, Report 2002/124},
    year = {2002},
    url = {http://eprint.iacr.org/2002/124},
}