\input zb-basic
\input zb-ioport
\iteman{io-port 70312129}
\itemau{Jaring, Michel; Krikhaar, Ren\'e L.; Bosch, Jan}
\itemti{Modeling variability and testability interaction in software product line engineering}
\itemso{ICCBSS, 120-129 (2008).}
\itemcc{}
\itemut{}
\itemli{http://doi.ieeecomputersociety.org/10.1109/ICCBSS.2008.9}
\end