\input zb-basic
\input zb-ioport
\iteman{io-port 03529340}
\itemau{Forster, W.}
\itemti{The structure of computational methods: Categorical notions and consistency, convergence, and stability.}
\itemso{Z. angew. Math. Mech. 56, Sonderheft, T283-T285 (1976).}
\itemcc{}
\itemut{}
\itemli{}
\end