Theophrastus
- Article from the Wikipedia openly-edited encyclopedia, adopted from an article in the 1911 Encyclopaedia Britannica.
- http://en.wikipedia.org/wiki/Theophrastus

Internet Encyclopedia of Philosophy: Theophrastus
- Concise article on this follower of Aristotle.
- http://www.utm.edu/research/iep/t/theophra.htm

Theophrastus Project Conferences
- List of the locations and topics of projects held as part of Project Theophrastus.
- http://www.ucl.ac.uk/GrandLat/people/sharples/conf.htm

History of Vegetarianism: Theophrastus
- Some excerpts from published works discussing the role of Theophrastus in the historical development of vegetarianism.
- http://www.ivu.org/history/greece_rome/theophrastus.html