\input zb-basic
\input zb-ioport
\iteman{io-port 70098533}
\itemau{Lee, Sang Ho; Henschen, Lawrence J.}
\itemti{Evaluation of extended recursive queries in deductive databases}
\itemso{DASFAA, 209-215 (1991).}
\itemcc{}
\itemut{}
\itemli{}
\end