\input zb-basic
\input zb-ioport
\iteman{io-port 50138699}
\itemau{Duc, Luu Hoang; Siegmund, Stefan}
\itemti{Hyperbolicity and invariant manifolds for planar nonautonomous systems on finite time intervals}
\itemso{I. J. Bifurcation and Chaos 18, No. 3, 641-674 (2008).}
\itemcc{}
\itemut{}
\itemli{doi:10.1142/S0218127408020562}
\end