Works

Epistles, or Fragments of Epistles
What we can reconstruct of the correspondence of St. Dionysius the Great. From Ante-Nicene Fathers (American edition), vol. 6.
http://www.ccel.org/ccel/schaff/anf06.iv.iii.html

Exegetical Fragments
Seven fragments from St. Dionysius the Great's exegetical works. "TOC" link at top of page. From Ante-Nicene Fathers (American edition), vol. 6.
http://www.ccel.org/fathers2/ANF-06/anf06-36.htm

Letter to Basilides the Bishop
Epitomes only. Was accepted as canonical by the Synod in Trullo. From the Nicene and Post-Nicene Fathers of the Christian Church, second series, vol. 14.
http://www.ccel.org/fathers2/NPNF2-14/Npnf2-14-179.htm

Various Sections of the Works
Includes fragments from "On the Promises", "On Nature", and other works by Dionysius the Great. From Ante-Nicene Fathers (American edition), vol. 6.
http://www.ccel.org/ccel/schaff/anf06.iv.iii.i.i.html