Thomistica.net
Pontificial Council for Promoting Christian Unity - THE GREEK AND LATIN TRADITIONS REGARDING THE PROCESSION OF THE HOLY SPIRIT
The Filioque: A Church Dividing Issue?: An Agreed Statement
The Roman ‘Clarification’ of the Doctrine of the Filioque by David Coffey
AN ORTHODOX RESPONSE TO THE CLARIFICATION ON THE FILIOQUE by Metropolitan John (Zizioulas) of Pergamon