\input zb-basic
\input zb-ioport
\iteman{io-port 50193074}
\itemau{Harper, Simon; Goble, Carole A.; Pettitt, Stephen}
\itemti{Proximity: walking the link}
\itemso{J. Digit. Inf. 5, No. 1 (2004).}
\itemcc{}
\itemut{}
\itemli{http://journals.tdl.org/jodi/article/view/127}
\end