Myth - Protagoras
- Review of Protagoras' thoughts on cosmology and the myths. By Swedish author and historian of Ideas Stefan Stenudd.
- http://www.stenudd.com/myth/greek/protagoras.htm

Protagoras
- Brief Wikipedia article on this thinker, noting his relativistic and agnostic teachings.
- http://en.wikipedia.org/wiki/Protagoras