Ecumenics, Intercultural Theology and Hermeneutics.
Hermeneutics (esp. the relation between scripture, tradition, and culture) and Intercultural Theology
Progress in Unity? Fifty Years of Theology within the World Council of Churches: 1945-1995 (Louvain/Grand Rapids, 1995).
Justification in Ecumenical Dialogue: Central Aspects of Christian Soteriology in Debate (Zoetermeer, 1996).
Sacraments of Freedom: Ecumenical Essays on Creation and Sacrament – Justification and Freedom (Zoetermeer, 1999).
The Tragedy of Human Freedom: The Failure and Promise of the Christian Concept of Freedom in Western Culture, Currents of Encounter 20. (Amsterdam-New York, 2003).
The Non-Western Jesus (a translation of the Dutch original is being prepared).
Vrije Universiteit The Netherlands