Stan Wagon

Guy. 数论中的未解问题. Springer. 2004. ISBN 978-0-387-20860-2.  Victor Klee; Stan Wagon. 平面几何和数论领域旧的和新的未解问题. 美国数学协会. 1996. ISBN 978-0-88385-315-3.  Simon Singh

2008: 167–173. ISBN 978-0-8218-4406-9. Zbl 1186.11004.  Klee, Victor; Wagon, Stan. Old and new unsolved problems in plane geometry and number theory. The

Mathematica (reprint), Georg Olms Verlag, 1970, pp 398–401, 436–446 Wagon, Stan（英语：Stan Wagon）, "Is Pi Normal?", The Mathematical Intelligencer, 7:3(1985) 65–67

（页面存档备份，存于互联网档案馆）, 2005. Gibbons produced an improved version of Wagon's algorithm. Rabinowitz, Stanley; Wagon, Stan. A spigot algorithm for the digits of Pi. American

  Moor Street Station: In the foreground is the wagon hoist to shed 'B' and in the distance the wagon hoist to shed 'A' both used to lower wagons to and