산술 기하 평균을 이용한 원주율의 계산

• Gauss, Landen, Ramanujan, the Arithmetic-Geometric Mean, Ellipses, π, and the Ladies Diary
  
  • Gert Almkvist and Bruce Berndt
  • The American Mathematical Monthly, Vol. 95, No. 7 (Aug. - Sep., 1988), pp. 585-608
• Ramanujan, Modular Equations, and Approximations to Pi or How to Compute One Billion Digits of Pi
  
  • J. M. Borwein, P. B. Borwein and D. H. Bailey
  • The American Mathematical Monthly, Vol. 96, No. 3 (Mar., 1989), pp. 201-219
• Recent Calculations of π: The Gauss-Salamin Algorithm
  
  • Nick Lord
  • The Mathematical Gazette, Vol. 76, No. 476 (Jul., 1992), pp. 231-242
• The Ubiquitous π
  
  • Dario Castellanos
  • Mathematics Magazine, Vol. 61, No. 2 (Apr., 1988), pp. 67-98