\input zb-basic
\input zb-ioport
\iteman{io-port 50300019}
\itemau{Apon, Daniel}
\itemti{Review of games, puzzles, \& computation by robert A. Hearn and Erik D. Demaine}
\itemso{SIGACT News 42, No. 3, 45-49 (2011).}
\itemcc{}
\itemut{}
\itemli{doi:10.1145/2034575.2034587}
\end