The church's history of compassion ministry. WLS Symposium on Compassion Ministry, 2022.
Recent sources and research on the Council of Ephesus. Presented at the ETS Annual Meeting, 2021.
How Lutherans should (and shouldn't) use the church fathers. Presented at the ETS Annual Meeting, 2008.
Friendship, fellowship and church politics in the Athanasian controversy. ETS Patristics Study Group, 2004.
Church and state from Constantine onward. Martin Luther College symposium, 1999.
The authenticity of Jerome's Letter 19. Expanded from the International Patristics Conference, Oxford, 1999.
What the early church taught and practiced about abortion and infanticide. Lutherans for Life presentation, 1994.
Forged papal letters and their path into medieval canon law. Columbia Medieval Guild (1991), NAPS (1996).
The house church in Paul's letters and what it meant. Presented at the ETS Annual Meeting, 2015.
A debated 4th-century inscription and Pope Liberius. Presented at the North American Patristics Society, 2016.
