Zero in Four Dimensions
- A paper discussing the historical, psychological, cultural, and logical perspectives of the number zero.
- http://www.pantaneto.co.uk/issue5/arsham.htm

The Digit Zero
- Some information about the number zero and links to other pages.
- http://www-personal.umich.edu/~danhorn/digits/zero.html

Zero
- A history of Zero that describes the introduction of zero and the main persons that brought advantages to it.
- http://www-groups.dcs.st-and.ac.uk/history/HistTopics/Zero.html