\input zb-basic
\input zb-ioport
\iteman{io-port 50207791}
\itemau{Khrushchev, Sergei}
\itemti{The great theorem of A.A. Markoff and jean Bernoulli sequences}
\itemso{J. Computational Applied Mathematics 233, No. 6, 1548-1553 (2010).}
\itemcc{}
\itemut{}
\itemli{doi:10.1016/j.cam.2009.02.069}
\end