\input zb-basic
\input zb-ioport
\iteman{io-port 70297261}
\itemau{Wanke, Egon}
\itemti{Paths and cycles in finite periodic graphs}
\itemso{MFCS, 751-760 (1993).}
\itemcc{}
\itemut{}
\itemli{doi:10.1007/3-540-57182-5\_66}
\end