Sedley, D. N.: Lucretius and the Transformation of Greek Wisdom, s. 1-. Cambridge University Press, 2003. ISBN 0521542146. Teoksen verkkoversio.
Everson, Ted: ”Empedocles and Darwin”, The gene: a historical perspective, s. 5. Greenwood guides to great ideas in science. Greenwood Publishing Group, 2007. ISBN 0313334498. Teoksen verkkoversio.
Graham, Daniel W.: The Texts of Early Greek Philosophy: The Complete Fragments and Selected Testimonies of the Major Presocratics, s. 428. Cambridge University Press, 2009. ISBN 0521845912. Teoksen verkkoversio.
