1. Bargmann, W.: Die Schilddrüse. In: Handbuch der mikroskopischen Anatomie des Menschen (W. v. Möllendorff, ed.), Bd. VI/2, S. 22?23. Berlin: Springer 1939.
2. Barrington, E. J. W.: The distribution and significance of organically bound iodine in the ascidianCiona intestinalis. J. Mar. Biol. Ass. U.K.36, 1?16 (1957).
3. ?: Some endocrinological aspects of the protochordata. In: Comparative endocrinology, ed. by A. Gorbman. New York: Wiley 1959.
4. ?: Hormones and evolution. London: Einglish Univ. Press 1964.
5. ?: The biology of hemichordata and protochordata. Edinburgh: Oliver and Boyd 1965.