Dionysius the Pseudo-Areopagite 
Article on the identity of the mysterious Pseudo-Areopagite, his writings, and their influence. From the Catholic Encyclopedia.
http://www.newadvent.org/cathen/05013a.htmPseudo-Dionysius in the Twelfth Century Latin West
How the Neoplatonic system of the Pseudo-Dionysius was influential in medieval theology and spirituality.
http://www.the-orb.net/encyclop/culture/philos/coulter.html
Dictionary of Christian Biography: Dionysius Pseudo-Areopagita
Article with extensive bibliography.
http://www.ccel.org/ccel/wace/biodict.v.iv.xxi.html
Dionysius the Areopagite
Lengthy article on Pseudo-Dionysius and his theology. By N. Bonwetsch, in the New Schaff-Herzog Encyclopedia of Religious Knowledge. Includes bibliography. Requires capability to view PNG files.
http://www.ccel.org/ccel/schaff/encyc03/Page_438.html
