| 1. | Protagoras | | | Two extant fragments from this thinker's teachings.
campus.northpark.edu |
| 3. | Protagoras | | | Short article summarizing this thinker's thought.
www.in2greece.com |
| 4. | Protagoras | | | Internet Encyclopedia of Philosophy article by Carol Poster. Deals extensively with what we know about the life, doctrines and influence of this Sophist.
www.utm.edu |
| 5. | Protagoras | | | Article from the 2000 Encyclopaedia Britannica. Treats of Protagoras in connection with the other members of the Sophist school.
www.kat.gr |
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