\input zb-basic
\input zb-ioport
\iteman{io-port 70282682}
\itemau{Rif\`a, Josep; Ronquillo, Lorena}
\itemti{Product perfect Z2 Z4-linear codes in steganography}
\itemso{ISITA, 696-701 (2010).}
\itemcc{}
\itemut{}
\itemli{doi:10.1109/ISITA.2010.5649667}
\end