Eriugena's Commentary On The Dionysian Celestial Hierarchy

The Dionysian mystical theology

Hugh of Saint Victor

Pseudo-Dionysius

St. Augustine, His Confessions, and His Influence

Calvin and Bullinger on the Lord's Supper

Biblical and Liturgical Symbols Within the Pseudo-Dionysian Synthesis (Studies and Texts (Pontifical Inst of Mediaeval Stds))

Singing Church History

The medieval development of liturgical symbolism