Links: This website contains links to third-party websites («external links»). These websites are subject to the liability of the respective operators. When linking the external links for the first time, the provider checked the external content for any legal infringements. At that time, no legal violations were apparent. The provider has no influence whatsoever on the current and future design and content of the linked pages. The setting of external links does not mean that the provider adopts the content behind the reference or link as his own. A permanent control of the external links is not reasonable for the provider without concrete indications of legal violations. However, if we become aware of any legal infringements, such external links will be deleted immediately.