\input zb-basic
\input zb-ioport
\iteman{io-port 70222925}
\itemau{Koopman, Arne; Siebes, Arno}
\itemti{Discovering relational items sets efficiently}
\itemso{SDM, 108-119 (2008).}
\itemcc{}
\itemut{}
\itemli{http://www.siam.org/proceedings/datamining/2008/dm08\_10\_Koopman.pdf}
\end