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The Author is not responsible for any contents linked or referred to from his pages - unless he has full knowlegde of illegal contents and would be able to prevent the visitors of his site from viewing those pages. If any damage occurs by the use of information presented there, only the author of the respective pages might be liable, not the one who has linked to these pages. Furthermore the author is not liable for any postings or messages published by users of discussion boards, guestbooks or mailinglists provided on his page.


The copyright for any material created by the author is reserved. Any duplication or use of such diagrams, sounds or texts in other electronic or printed publications is not permitted without the author's agreement.

Images used for the top image slider on the front page:

  • Image #2 by Peeter Viisimaa; istockphoto
  • Image #3 by Péter Gudella; 123RF
  • Image #4 by Alex on Flickr under CC BY 2.0 (changes: original image cropped)

Images used for the bottom image slider on the front page:

  • Image #1 by Woody Hibbard on Flickr under CC BY 2.0
  • Image #2 by Peeter Viisimaa; istockphoto
  • Image #3 by David Precious on Flickr under CC BY 2.0
  • Image #4 by KB; Fotalia
  • Image #5 by Jeff Kubina on Flickr under CC BY-SA 2.0 (changes: original image cropped)
  • Image #6 by CTBTO on Flickr under CC BY 2.0

Parallax background image by Alexander Bondarenko; 123RF

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Legal force of this disclaimer

This disclaimer is to be regarded as part of the internet publication which you were referred from. If sections or individual formulations of this text are not legal or correct, the content or validity of the other parts remain uninfluenced by this fact.