Old Catholic

• Mathew, Arnold H., The Old Catholic Missal and Ritual, London: Cope and Fenwick, 1909.
  
  
• Smit, Peter-Ben, "The Old Catholic view on scripture and tradition : a short study of a theological organism", Internationale kirchliche Zeitschrift 97 (2007), 106-123.
  
  

Ilia Delio

• Delio, Ilia, "Bonaventure's Metaphysics of the Good", Theological Studies 60 (1999), 228-246.
  
  
• Delio, Ilia, "Brain Science and the Biology of Belief: A Theological Response", Zygon vol. 38, no. 3 (September 2003), 573-585.
  
  

Resources from Utrecht Summer School

• Aldenhoven, Herwig, "Presidency at the Eucharist in the Context of the Theology of Icons: Questions about the Ecclesial Representation of Christ by the Priesthood"
  
  
• Arx, Urs von, "The Old Catholic Churches of the Union of Utrecht"
  
  
• Goergen, Donald J., "Spirituality" in The Praxis of the Reign of God: An Introduction to the Theology of Edward Schillebeeckx, Mary Catherine Hilkert and Robert J. Schreiter, eds.
  
  
• Hallebeek, Jan, "Questions of Canon Law Concerning the Election and Consecration of a Bishop for the Church of Utrecht: The Casus Resolutio of 1722"
  
  
• Hallebeek, Jan, "The Old Catholic Synods: Traditional or Innovative Elements within the Constitution of the Church?"
  
  
• Statutes of the International Old Catholic Bishops Conference, with the 1889 Declaration of Utrecht as an appendix
  
  
• Ouwens, Koenraad, "Liturgy in the Old-Catholic Church"
  
  
• Charles H. Parker, Faith on the Margins: Catholic and Catholicism in the Dutch Golden Age, Introduction and chapters 1 and 3
  
  
• Ploeger, Mattijs, "Catholicity, Apostolicity, the Trinity and the Eucharist in Old Catholic Ecclesiology"
  
  
• Ploeger, Mattijs, "Thoughts about systematic theology in Old Catholic perspective"
  
  
• Ploeger, Mattijs, Celebrating Church: Ecumenical Contributions to a Liturgical Theology
  
  
• Selected Bibliography (English) of Old Catholic Theology
  
  
• Van der Welde, Wietse, "Who are the Old Catholics? Their history, organization and ecumenical relations"
  
  
• Vercammen, Joris, "The Old-Catholic Churches and the 'construction of Europe'"
  
  
• Visser, Jan (2003), "The Old Catholic churches of the Union of Utrecht", International journal for the Study of the Christian Church, 3:1, 68-84
  
  

1998 Roman lectionary

• Volume 1, Sundays and Feasts, Part 1
• Volume 1, Part 2
• Volume 2, Weekdays, Part 1
• Volume 2, Part 2