\input zb-basic
\input zb-ioport
\iteman{io-port 50139539}
\itemau{Calude, Cristian S.; Dinneen, Michael J.}
\itemti{Exact approximations of omega numbers}
\itemso{I. J. Bifurcation and Chaos 17, No. 6, 1937-1954 (2007).}
\itemcc{}
\itemut{}
\itemli{doi:10.1142/S0218127407018130}
\end