\input zb-basic
\input zb-ioport
\iteman{io-port 70182314}
\itemau{Lenz, Reiner}
\itemti{On color edge detection}
\itemso{PICS, 278-282 (2000).}
\itemcc{}
\itemut{}
\itemli{http://www.imaging.org/store/epub.cfm?abstrid=1602}
\end