\input zb-basic
\input zb-ioport
\iteman{io-port 50110157}
\itemau{Stiller, Burkhard}
\itemti{Telecommunication economics - overview of the field, recommendations, and perspectives}
\itemso{Computer Science - R&D 23, No. 1, 35-43 (2009).}
\itemcc{}
\itemut{}
\itemli{doi:10.1007/s00450-009-0050-3}
\end