A Little Child Shall Lead us the Theology of the Child

von Balthasar Hans Urs Unless You Become Like This Child. San Francisco: Ignatius Press, 1988

Ulrich Ferdinand Der Mensch als Anfang. Einsiedeln, 1970.

Schindler David L. Heart of the World, Center of the Church. Grand Rapids, MI: Eerdmans Publishing Company, 1996.

Oster Stefan “The Other and the Fruitfulness of Personal Acting.” (Paper presented at Balthasar Conference, Sterling, VA, April 2005)