\input zb-basic
\input zb-ioport
\iteman{io-port 50244037}
\itemau{Hammack, Richard}
\itemti{Isomorphic components of direct products of bipartite graphs}
\itemso{Discussiones Mathematicae Graph Theory 26, No. 2, 231-248 (2006).}
\itemcc{}
\itemut{}
\itemli{http://www.discuss.wmie.uz.zgora.pl/gt/26\_2/gt26-357.htm}
\end