2016
Synodality and Primacy during the First Millennium: Towards a Common Understanding in Service of the Unity of the Church - Chieti 2016
2007
Ecclesiological and Canonical Consequences of the Sacramental Nature of the Church: Ecclesial Communion, Conciliarity and Authority - Ravenna 2007
1977
Reaction to the Agenda of the Great and Holy Council of the Orthodox Church - Washington, DC 1977