\input zb-basic
\input zb-ioport
\iteman{io-port 70242850}
\itemau{Kashikawa, Shingo; Ogura, Shogo; Shioya, Isamu; Miura, Takao}
\itemti{Aggregates as meta functions}
\itemso{ISMIS, 203-212 (2002).}
\itemcc{}
\itemut{}
\itemli{doi:10.1007/3-540-48050-1\_24}
\end