@misc{cryptoeprint:2011:637,
    author = {Laszlo Hars},
    title = {Random Number Generation Based on Oscillatory Metastability in Ring Circuits},
    howpublished = {Cryptology ePrint Archive, Report 2011/637},
    year = {2011},
    url = {http://eprint.iacr.org/2011/637},
}