Dr. Edward Zeller on Empedocles - From Zeller's 1889 work, Outlines of the History of Greek Philosophy. Considers the scientific and mystic aspects of Empedocles' teachings. - http://www.wright.edu/cola/Dept/PHL/Class/PS/ZelEmped.html
An Empedocles Bibliography - A list of writings about this thinker in various European languages. - http://www.presocratics.org/empedocles.htm
Cosmos of the Ancients: Empedocles - Short article by Stephen Stenudd reviewing the cosmological aspects of Empedocles' writings, and Aristotle's reaction to them. - http://www.stenudd.com/myth/greek/empedocles.htm
Empedocles - Lecture notes by S. Marc Cohen, presenting Empedocles as part of the pluralistic response to Parmenides' teachings. - http://faculty.washington.edu/smcohen/320/emped.htm
Empedocles of Acragas - Biographical article by J J O'Connor and E F Robertson. Includes glossary and links to biographies of related thinkers. - http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Empedocles.html
The Structure of Empedocles' Fragment 17 - A 2000 paper by Simon Trepanier. An intensive study of this, the longest and most illuminating of Empedocles' fragments. - http://www.humboldt.edu/~essays/paper1.html
Empedocles of Agrigentum at Peithô's Web - Includes the Leonard translation of the Empedocles' fragments alongside the original Greek, as well as the Life of Empedocles from Diogenes Laertius. - http://classicpersuasion.org/pw/empedocles/
Empedocles: Fragments and Commentary - From the Hanover Historical Texts Project. Arthur Fairbanks translations of the fragments of Empedocles. - http://history.hanover.edu/texts/presoc/emp.htm