Analysis of information sources in references of the Wikipedia article "Chronology of computation of π" in English language version.
{{cite book}}
: CS1 maint: date and year (link)Sandifer, Ed (2006). "Why 140 Digits of Pi Matter" (PDF). Southern Connecticut State University. Archived from the original (PDF) on 2012-02-04.
π ≈ 2,827,433,388,233/9×10−11 = 3.14159 26535 92222..., good to 10 decimal places.
Sandifer, Ed (2006). "Why 140 Digits of Pi Matter" (PDF). Southern Connecticut State University. Archived from the original (PDF) on 2012-02-04.
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: CS1 maint: archived copy as title (link){{cite web}}
: CS1 maint: archived copy as title (link)Sandifer, Ed (2006). "Why 140 Digits of Pi Matter" (PDF). Southern Connecticut State University. Archived from the original (PDF) on 2012-02-04.
{{cite web}}
: CS1 maint: archived copy as title (link){{cite web}}
: CS1 maint: archived copy as title (link)