The content of this web site is copyright-protected and may not be reproduced, distributed or processed with the use of an electronic system in any form (photocopying, microfilm or other methods), without written authorization, not even for the purposes of teaching. An exception to this - provided that no changes to the content of the web site are carried out - is the use of the content for personal and non-commercial purposes. This permission expires if the above conditions are breached. All rights, including translation, copying and duplication of the content or parts thereof, are reserved.