Wolfram Research
Wolfram Math World: Stokes Theorem
This site expresses Stokes Theorem: the relationship between curl, gradient, and divergence theorem. Includes references and links to further information.
Wolfram Research
Wolfram Math World: Curl Theorem
This mathWorld site explains this special case of Stokes' Theorem. The site contains links for reference.
Other
Lake Tahoe Community College: Stokes' Theorem
This site gives an explanation of Stokes' Theorem and provides an example problem that shows the Stokes' Theorem in use.