“The Unresponsiveness of the Late Medieval Church: a Reconsideration,” The Sixteenth Century Journal 9 (1978):3-26.
“Melchior von Meckau: A Missing Link in the Eck Zins-Disputes of 1514-1516?,” Archiv für Reformationsgeschichte 74 (1983): 25-37.
“Fear and Confession on the Eve of the Reformation,” Archiv für Reformationsgeschichte 75 (1984): 153-75.
“Building Lending and Cancelling Debts: Damian Hugo von Schönborn, Cardinal and Prince-Bishop of Speyer and Constance (d. 1743),” Sangallensia in Washington, The Arts and Letters in Medieval and Baroque St. Gall, Viewed from the Late Twentieth Century, ed. James C. King, (Peter Lang Publishing, Inc., New York, 1993), pp. 33-45.
“‘For Force is Not of God’? Compulsion and Conversion from Yahweh to Charlemagne,” Varieties of Religious Conversion in the Middle Ages, edited by James Muldoon. (University Press of Florida, 1997), pp. 49-62.
“Was Art Really the ‘Book of the Illiterate’?,” in Reading Images and Texts Medieval Images and Texts as Forms of Communication, eds. Marielle Hageman and Marco Mostert. (Turnhout, Belgium: Brepols, 2005), pp. 63-107.
“Reflections on “Was Art Really the ‘Book of the Illiterate’?,” in Reading Images and Texts. Medieval Images and Texts as Forms of Communication, eds. Marielle Hageman and Marco Mostert, Utrecht Studies in Medieval Literacy 8 (Turnhout, 2005), pp. 201-09.
“Were Nicholas V and Pius II Really Renaissance Popes,” in Where Heaven and Earth Meet, Essays on Medieval Europe in Honor of Daniel F. Callahan, eds. Michael Frassetto, Matthew Gabriele and John D. Hosler. (Brill, 2014), pp. 63-78.
“The Evolution of Latin Canon Law on the Clergy and Armsbearing to the Thirteenth Century,” in Between Sword and Prayer. Warfare and Medieval Clergy in Cultural Perspective, eds. Radoslaw Kotecki et al. (Brill, 2018), pp. 497-516.
“Armsbearing by the Clergy and the Fourth Lateran Council,” in The Fourth Lateran Council and the Ius Commune, eds. Atria Larson and Andrea Massironi. To be published in 2018 by Brepols Belgium.
“Armsbearing By The Clergy In The History Of The Canon Law Of The Episcopal Church In The United States,” Anglican and Episcopal History 86/3 (Sept. 2017): 247-271.