There are a few other rules that Simpson proved. For example, Simpson's 3/8 Rule<ref>http://math.fullerton.edu/mathews/n2003/Simpson38RuleMod.html</ref> shows that cubic functions can be used to approximate integrals. | There are a few other rules that Simpson proved. For example, Simpson's 3/8 Rule<ref>http://math.fullerton.edu/mathews/n2003/Simpson38RuleMod.html</ref> shows that cubic functions can be used to approximate integrals. |