\input zb-basic
\input zb-ioport
\iteman{io-port 50021360}
\itemau{Bender, Edward A.; Canfield, E. Rodney}
\itemti{Log-concavity and related properties of the cycle index polynomials}
\itemso{J. Comb. Theory, Ser. A 74, No. 1, 57-70 (1996).}
\itemcc{}
\itemut{}
\itemli{doi:10.1006/jcta.1996.0037}
\end