1. Hebb, D. O., The Organization of Behavior (Wiley, New York, 1949).
2. Hyden, H., in Biochemistry of the Central Nervous System, Fourth Intern. Cong. Biochem., edit. by Brucke, F., 64 (Pergamon Press, New York, 1959).
3. Schmitt, F., in Horizons in Biochemistry, edit. by Kasha, M., and Pullman, B., 437 (Academic Press, New York, 1962).
4. Hyden, H., and Hartelius, H., Acta Psychiat. Neurol. Scand., Kbh., Supp. 48 (1948).
5. Brattgard, S., Acta Radiol., Supp., 96 (1952).