- The Internet Encyclopedia of Philosophy, biography of Heraclitus.www.utm.edu/research/iep/h/heraclit.htm
- The Window: Philosophy on the Internet, biography of Heraclitus of Ephesus.www.trincoll.edu/depts/phil/philo/phils/heraclitus.html
- Heraclitus Discussion Deck.killdevilhill.com/z/yphilo1d/Heraclitushall/shakespeare1.html