I. Monographien
- L' inspiration de l'écriture sainte dans la théologie de Saint Bernard. Romae: Herder, 1964. (Studia Anselmiana, 53).
- The Formation of the New Testament Canon. An Ecumenical Approach, Paulist Press, 1983
- Inspiration & Interpretation: A Theological Introduction to Sacred Scripture. – Washington, D.C. : Catholic University of America Press, 2010. – ISBN 978-0813217468
- The Marian mystery : the outline of a Mariology. Staten Island, NY : St Pauls, 2013.
II. Beiträge in Zeitschriften und Sammelwerken
- The Role of the Bible in St. Bernard's Spirituality, in: ACi 25 (1969) 3–13
- Use and Interpretation of St. John´s Prologue in the Writings of St. Bernard, in: ACi 35 (1979) 205–226
- St. Bernard´s Spirituality and the Benedictine Rule in the Steps of Humility, in: ACi 36 (1980) 248–262
- The Authenticity of Saint Bernard´s Letter from his Deathbed, in: ACi 36 (1980) 263–268
- The First Step in Spiritual Life: Conversion, in: ACi 46 (1990) 65–84
- Bernard´s Concept of the Spirituel Life, in: ACi 53 (1997) 3–14
- Remarks and suggestions concerning the critical text of Saint Bernard´s treatise “De consideratione”, in: ACi 54 (2002) 285–310
- In memoriam Polycarpi Zakar Abbatis Generalis (1985–1995) et Abbatis de Zirc (1997–2011), in: ACi 63 (2013) 9–12