Pi-dag (Danish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pi-dag" in Danish language version.

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abc.net.au

Apollo, Adrian (10. marts 2007). "A place where learning pi is a piece of cake" (PDF). The Fresno Bee. Arkiveret fra originalen (PDF) 28. februar 2014. Hentet 6. juli 2020.

Berton, Justin (11. marts 2009). "Any way you slice it, pi's transcendental". San Francisco Chronicle. Arkiveret fra originalen 31. august 2010. Hentet 18. marts 2011.

Bellos, Alex (14. marts 2015). "Pi Day 2015: a sweet treat for maths fans". theguardian.com. Hentet 14. marts 2016.

"Pi Approximation Day is celebrated today". Today in History. Verizon Foundation. Arkiveret fra originalen 1. december 2010. Hentet 30. januar 2011.

Berton, Justin (11. marts 2009). "Any way you slice it, pi's transcendental". San Francisco Chronicle. Arkiveret fra originalen 31. august 2010. Hentet 18. marts 2011.
Apollo, Adrian (10. marts 2007). "A place where learning pi is a piece of cake" (PDF). The Fresno Bee. Arkiveret fra originalen (PDF) 28. februar 2014. Hentet 6. juli 2020.
"Pi Approximation Day is celebrated today". Today in History. Verizon Foundation. Arkiveret fra originalen 1. december 2010. Hentet 30. januar 2011.