Procession

Karl Barth on the Filioque

David Guretzki.

Ecumenical Perspectives on the Filioque for the 21st Century

Myk Habets

The mystagogy of the Holy Spirit

Saint Photios ; translated with an introduction by Joseph P. Farrell ; with a preface by Archimandrite Chrysostomos.

On the Clause "And the Son," in Regard to the Eastern Church and the Bonn Conference: A Letter to the Rev. H.P. Liddon

Edward Bouverie Pusey

Le belle ascese: antologia del "Contro Eunomio"

Gregorio di Nissa ; Massimiliano Zupi (ed.).

On the history of the doctrine of the Procession of the Holy Spirit: from the Apostolic Age to the death of Charlemagne

by H.B. Swete

Logos peri tēs tou Hagiou Pneumatos mystagōgias

Phōtiou Partriarchou = Liber de Spiritus Sancti mystagogia / Photii Constantinopolitani ; quem notis variis illustratum ac theologicae crisi subjectum nunc primum edidit J. Hergenroether

Concordia nationum Christianarum per Asiam, Africam, et Europam, in fidei catholicae dogmatibus: apud borealis Europae Protestantes deseri contra fas pronuper coeptis

indicata ab Abrahamo Ecchellensi, Maronita, et Leone Allatio Graeco ; juncta sunt Bartoldi Nihusii duo ad Protestantium eorumdem academicos programmata

The filioque: history of a doctrinal controversy

by A. Edward Siecienski.

Spirit of God, Spirit of Christ: Ecumenical reflections on the Filioque controversy (Faith and order paper)

Lukas Vischer