Sources
Fibonacci
http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibBio.html
Ars Magna
http://www.ms.uky.edu/~sohum/ma330/files/eqns_2.pdf
Fibonacci
http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibBio.html
Ars Magna
http://www.ms.uky.edu/~sohum/ma330/files/eqns_2.pdf