\input zb-basic
\input zb-ioport
\iteman{io-port 70233060}
\itemau{Nebel, Bernhard; Koehler, Jana}
\itemti{Plan modification versus plan generation: A complexity-theoretic perspective}
\itemso{PuK, 7-17 (1993).}
\itemcc{}
\itemut{}
\itemli{}
\end