\input zb-basic
\input zb-ioport
\iteman{io-port 50221762}
\itemau{Al-Saidy, Haider Fakher Radhi}
\itemti{New proposed algorithms for nth order butterworth passive filter computer-aided design}
\itemso{Int. J. Adv. Comp. Techn. 2, No. 5, 118-124 (2010).}
\itemcc{}
\itemut{}
\itemli{http://www.aicit.org/ijact/ppl/13thJournalforPPL.pdf}
\end