• http://www.richardlong.org/
  • http://www.rsa.org.uk/arts/index.asp
  • http://www.sharjahbiennial.org/en/
  • http://www.robertsmithson.com/
  • http://www.christojeanneclaude.net/
  • http://www.lablaa.org/blaavirtual/todaslasartes/anam/anam23a.htm