1. Fibonacci’s Liber Abaci: A Translation into Modern English of Leonardo Pisano’s Book of Calculation;Sigler,2002
2. On Fibonacci functions with Fibonacci numbers
3. The Large Scale Structure Of Space-Time;Hawking,1973
4. General Relativity;Wald,1984
5. Spacetime and Geometry: An Introduction to General Relativity;Carroll,2004