http://blog.360.yahoo.com/Factuurexpress?p=5672
http://www.overunity.com/index.php/topic,1997.0.html
http://groups.google.com/group/sci.physics/browse_frm/thread/bf3034c17c10359f
http://groups.google.com/group/sci.energy/browse_frm/thread/cd55163b086fa20a
http://groups.google.com/group/sci.physics/browse_frm/thread/62748e6a09d36186