Pi: A Source Book - J.L. Berggren, Jonathan Borwein, Peter Borwein - Google Books

https://books.google.de/books?id=QhbrBwAAQBAJ&pg=PA591

This book documents the history of pi from the dawn of mathematical time to the present. One of the beauties of the literature on pi is that it allows for the inclusion of very modern, yet accessible, mathematics. The articles on pi collected herein…