\input zb-basic
\input zb-ioport
\iteman{io-port 50306004}
\itemau{Tohumoglu, Gulay}
\itemti{Analysis of periodically time-varying discrete-time systems in spectral domain}
\itemso{Applied Mathematics and Computation 162, No. 3, 1151-1165 (2005).}
\itemcc{}
\itemut{}
\itemli{doi:10.1016/j.amc.2004.02.002}
\end