Demons and Prayer: Spiritual Excercises in the Monastic Community of Gaza in the Fifth and Sixth Centuries

Bitton-Ashkelony, B., "Demons and Prayer: Spiritual Excercises in the Monastic Community of Gaza in the Fifth and Sixth Centuries", Vigiliae Christianae 57, no. 2 (2003): 200-221.
http://www.jstor.org/stable/1584634