@misc{cryptoeprint:2006:177,
    author = {Dennis Hofheinz and Joern Mueller-Quade and Dominique Unruh},
    title = {On the (Im-)Possibility of Extending Coin Toss},
    howpublished = {Cryptology ePrint Archive, Report 2006/177},
    year = {2006},
    url = {http://eprint.iacr.org/2006/177},
}