\input zb-basic
\input zb-ioport
\iteman{io-port 50189853}
\itemau{Pippenger, Nicholas}
\itemti{The blocking probability of spider-web networks}
\itemso{Random Struct. Algorithms 2, No. 2, 121-150 (1991).}
\itemcc{}
\itemut{}
\itemli{}
\end