Gholami, M., Geombe, B. G. and Williams, P. J. (1996) Amount of glycosides in grapevine organs During berry development, Australian Journal of Grape and wine Research, 2: 59-63. Gholami, M. (2002) Anthocyanin Biosynthesis and Accumulation in Shiraz Berries. Journal of Ultra Scientist of Physical Sciences, 14 (2), 148-159.
A formula for Pi which involves just the Fibonacci numbers. It explains from first principles how to use the idea of slope, expressed as tangents of angles, and Gregory's formula for finding angles given' a tangent. Several beautiful and siple formula re derived on the page with investigatory questions to find more formulae. Suitable for 12-15 year olds.