References
- Ramanujan S. Modular equations and approximations to π. Quarterly Journal of Mathematics. 1914;45:350–372.
- Berggren L, Borwein J, Borwein P. Pi: a source book. New York: Springer-Verlag; 1997, 2000.
- Berndt B. Ramanujan's notebooks, Part III. New York: Springer-Verlag; 1991.
- Borwein J, Borwein P. Pi and the AGM: a study in analytic number theory and computational complexity. Canadian Mathematical Society Series of Monographs and Advanced Texts. New York: Wiley; 1987.
- Borwein JM, Borwein PB, Bailey DH. Ramanujan, modular equations, and approximations to Pi or how to compute one billion digits of Pi. Amer Math Monthly. 1989;96:201–219. doi: 10.2307/2325206
- Guillera J. Easy proofs of some Borwein algorithms for π. Amer Math Monthly. 2008;115:850–854.
- Zudilin W. Lost in translation. In: Kotsireas I, and Zima EV, editors. Advances in combinatorics, waterloo workshop in computer algebra W80 (May 26–29, 2011). Berlin: Springer-Verlag; 2013. p. 287–293.
- Ekhad S, Zeilberger D. A WZ proof of Ramanujan's formula for π. In: Rassias JM, editor. Geometry, analysis and mechanics. Singapore: World Scientific; 1994. p. 107–108.
- M Petkovs˘ek, Wilf H, Zeilberger D. A=B. A K Peters, Ltd.: Wellesley, MA; 1996.
- Ekhad S. Forty “Strange” Computer-Discovered and Computer Proved (of course!) Hypergeometric Series Evaluations. (available on Zeilberger's web-site).