References from website

We had found some websites that supports our findings.

http://www.artistdaily.com/blogs/drawing/archive/2009/02/10/drawing.aspx

This website had shown 21 types of measurements that Leornado had proven, thus we choosen some of it to prove it.

http://partner.galileo.org/tips/davinci/ourwork.html

This website had been done by a group of students which proved 11 types of measurements to prove Leornado's theory.

http://mathforum.org/alejandre/frisbie/math/leonardo.html

This website shows a group of students work on showing how they used the steps to get their results.