1. Wilson, S.: Neurology. First edition. Vol. II, p. 1145. Williams and Wilkins Co. Baltimore. 1940.
2. Wechsler, I.: Textbook of Clinical Neurology. Fourth edition. Pp. 554–555. Saunders Co. Philadelphia. 1939.
3. Grinker, R.: Neurology. Second edition. P. 790. Charles Thomas. Springfield, Ill. 1937.
4. Groff, R., and Grant, F.: Chronic subdural hematoma. Surg. Gynec., and Obst., 74:9, January, 1942.
5. Olkon, D.: Chronic subdural hematoma with acute psychotic manifestations, operation and recovery. J. A. M. A., 110:1664, May 14, 1938.