User-agent: PetalBot
Disallow: /

User-agent: Twitterbot
Disallow: /

User-agent: Amazonbot
Disallow: /

User-agent: *
Disallow: /vbsadmin/
Disallow: /DOI/
Disallow: /rss/
Disallow: /bilder/
Disallow: /media/
Disallow: /preview/
Disallow: /assets/
Crawl-delay: 2