The producers wish to thank:
- Max Duenki for his technical support.
- Hanspeter Schmid for his explanations of how to scan properly.
- Martin von Stein and Roya Soleymani Kohler for providing access
to the scanner of the EE department.
- Gerhard Kraemer and Beat Keusch for their moral support and
for their promise to participate in the production of the next draft version.