\input zb-basic
\input zb-ioport
\iteman{io-port 70120578}
\itemau{K\"olling, Michael; Rosenberg, John}
\itemti{Guidelines for teaching object orientation with Java}
\itemso{ITiCSE, 33-36 (2001).}
\itemcc{}
\itemut{}
\itemli{doi:10.1145/377435.377461}
\end