1. http://www.tmt.org
2. http://www.eso.org/sci/facilities/eelt/
3. http://www.gmto.org/
4. Looking beyond 30m-class telescopes: the Colossus project;Kuhn,2014
5. Global warming as a detectable thermodynamic marker of Earth-like extrasolar civilizations: The Colossus project;Kuhn,2014