1. Empedocles' account of breathing;Booth;J Helenic Studies,1970
2. The effect of simile: Empedocles' theories of seeing and breathing;O'Brien;J Helenic Studies,1970
3. Empédocles, III Les Origines, Commentaire 2;Bollack,1969
4. Aristotle: Growth and Structure of His Thought;Lloyd,1968
5. Furley D J, Wilkie J S. Galen on Respiration and the Arteries. Princeton, NJ: Princeton University Press, 14–22.