Augustine, Manichaeism, and the Logic of Persecution.
Archiv für Religionsgeschichte 7 (2005): 71-84.

The Leap of the Soul in Manichaeism.
  In Il Manicheismo: Nuove Prospettive della Richerca.  A. Van Tongerloo & L. Cirillo, eds.  Turnhout: Brepols, 2005.  9-26.

The Cantillated Manichaean Meal Hymns of the Turfan Collection.
  In Turfan Revisited.  Desmond Durkin-Meinsterernst et al.,  eds.  Berlin: Dietrich Reimer Verlag, 2004.  30-36.

The Near Eastern Connections of Manichaean Confessionary Practice.
  ARAM 16 (2004): 161-177.

The Metabolism of Salvation: Manichaean Concepts of Human Physiology.
  In The Light and the Darkness: Studies in Manichaeism and its World.  Paul Mirecki and Jason BeDuhn, eds.  Leiden: E. J. Brill, 2001.  5-37.

The Authenticity and Doctrine of (Ps.?) Mani’s Letter to Menoch.  In The Light and the Darkness: Studies in Manichaeism and its World.  Paul Mirecki and Jason BeDuhn, eds.  Leiden: E. J. Brill, 2001.  128-172.

Eucharist or Yasna?: Antecedents of Manichaean Food Ritual.
In Studia Manichaica.IV International Congress zum Manichäismus, 14.-18. Juli 1997 . R.E.Emmerick, W. Sundermann and P. Zieme, eds. Berlin: Akademie Verlag, 2000.  14-36.

Manichaean Asceticism; Manichaean Ritual; Manichaean Hymnody; Manichaean Theology.
  In Religions of Late Antiquity in Practice.  Richard Valantasis, ed.  Princeton: Princeton University Press, 2000.  122-130, 316-321, 364-368, 481-488.

The Tebessa Codex: Manichaean Biblical Exegesis and Church Order.
In Emerging from Darkness.Paul Mirecki and Jason BeDuhn, eds.Leiden: E. J. Brill, 1997. 33-87.

The Manichaean Sacred Meal.
  In Turfan, Khotan und Dunhuang.  Ronald E. Emmerick et al., eds.  Berlin: Akademie Verlag, 1996.  1-17.

The Battle for the Body in Manichaean Asceticism.
  In Asceticism.  Vincent Wimbush and Richard Valantasis, eds.  London: Oxford University Press, 1995.  513-519.

Magical Bowls and Manichaeans. 
In Ancient Magic and Ritual Power.  Marvin Meyer and Paul Mirecki, eds.  Leiden: E. J. Brill, 1995.  419-434.

A Regimen for Salvation: Medical Models in Manichaean Asceticism.  
Semeia 58 (1992): 109-134.