http://moon.inf.uji.es/~gea/encsol3/
 http://www.zekes.com/~aguadelsol/
 http://www.accessone.com/~sbcn/index.htm
 http://www.jyu.fi/~hvirtane/chin1.html
 http://www.jyu.fi/~hvirtane/risto/index.htm
 http://www.web.net/~sunwind/solar/solar_energy_uses.html
 http://hometown.aol.com/rickfordg/index.htm
 http://www.access.ch/private-users/cuisinesolaire/u_intro.html
 http://www.sunlightworks.com/
 http://www.solarsolns.com/
 http://www.demon.co.uk/tfc/sunday/alt_SunDay.html
 http://pollux.fe.uni-lj.si/ises-slo/eurosun98.html
 http://www.users.bigpond.com/solarbbq/
 http://solstice.crest.org/index.shtml
 http://www.eden.com/~solar/
  http://www.ata.org.au/
 http://www.solarenergy.org/
 http://www.humboldt.edu/~ccat/sub/solovn.htm
 http://www.solarenergie.com/kocher/solarkocher.html#verwendung