References
- Traditional nursery rhyme
- Ruckert E. Kindertotenlieder. (Symphonic Recording). Composer. In album notes: EMI recording Translation, G. Mahler. Michael Kennedy. 1987; CDC 7477932
- Tillich P. Systematic Theology, Vol. 1. University of Chicago Press, Chicago 1951; 182–186
- Tillich P. 1951; 174–178
- Tillich P. The Shaking of the Foundations. Charles Scribner's Sons, New York 1948; 154–159
- Tillich P. 1948; 161–162