\input zb-basic
\input zb-ioport
\iteman{io-port 70530121}
\itemau{Liu, Jingwei; Sun, Rong; Ma, Wenping; Li, Ying; Wang, Xinmei}
\itemti{Fair exchange signature schemes}
\itemso{AINA Workshops, 422-427 (2008).}
\itemcc{}
\itemut{}
\itemli{http://doi.ieeecomputersociety.org/10.1109/WAINA.2008.51}
\end