\input zb-basic
\input zb-ioport
\iteman{io-port 03460302}
\itemau{Richmond, L.Bruce}
\itemti{On Hamiltonian polygons.}
\itemso{J. Comb. Theory, Ser. B 21, 81-87 (1976).}
\itemcc{}
\itemut{}
\itemli{doi:10.1016/0095-8956(76)90031-9}
\end