Here are a few links to Internet sites which are an inspiration for me and will provide you some indispensable background information.

 

GENERAL:

http://www.lucypringle.co.uk

http://www.cropcircleconnector.com/interface2005.htm

http://cropcirclewisdom.com/index.html

http://www.cropcirclecenter.com

http://www.temporarytemples.co.uk

https://nl-nl.facebook.com/pages/Crop-Circles-UFOs-Ancient-Mysteries-Scientific-Speculations/246667595346687

http://www.cerclesdanslanuit.com

http://www.cropcirclereporter.com

http://davidpratt.info/cropcirc1.htm

 

CROP CIRCLE (RE)CONSTRUCTION)

http://www.zefdamen.nl/CropCircles/en/Crop_circles_en.htm

 

MATHEMATICS

http://en.wikipedia.org/wiki/Phi

http://en.wikipedia.org/wiki/Pi

http://www.hypermaths.org/cropcircles

http://www.goldennumber.net

 

ANALYSIS AND MEANING

http://www.michaelglickmanoncropcircles.com

http://www.randell.nl/06.html

http://www.cropcirclesandmore.com/content/welcome.html

http://cropcirclemeanings.blogspot.nl

http://inter-intelligence-communications.com

 

SACRED GEOMETRY

http://www.geometrycode.com

http://www.cropcirclecyclist.com

http://www.sacred-geometry.com/codes_ofthe_cosmos.html

http://www.theorderoftime.com

http://theorderoftime.com/science/sciences/articles/cropcircles.html#The%20facts