\input zb-basic
\input zb-ioport
\iteman{io-port 70946900}
\itemau{Halawa, Sherif A.; Pang, Derek; Cheung, Ngai-Man; Girod, Bernd}
\itemti{Classx: an open source interactive lecture streamingsystem}
\itemso{ACM Multimedia, 719-722 (2011).}
\itemcc{}
\itemut{}
\itemli{doi:10.1145/2072298.2072428}
\end