\input zb-basic
\input zb-ioport
\iteman{io-port 03556153}
\itemau{Godsil, C.; McKay, B.}
\itemti{Some computational results on the spectra of graphs.}
\itemso{Combin. Math. IV, Proc. 4th Aust. Conf., Adelaide 1975, Lect. Notes Math. 560, 73-92 (1976).}
\itemcc{}
\itemut{}
\itemli{}
\end