- A Rigorous Treatment of Division by Zero - By considering a new notion of division, one can allow division by zero, but the algebraic rules have to be modified.
- The Digit Zero - Some information about the number zero and links to other pages.
- Zero - A history of Zero that describes the introduction of zero and the main persons that brought advantages to it.
- Zero in Four Dimensions - A paper discussing the historical, psychological, cultural, and logical perspectives of the number zero.