1. Acta;BUCHTHAL, F.; CLEMMESEN, S.;Psychiat. Kbh,1943
2. DENNY-BROWN, D., and PENNYBACKER, J. (1938), Brain, 61, 311.
3. DENNY-BROWN, D. (1944), Arch. Neurol. and Psychiat., Chicago, 61, 99.
4. HODES, R., LARRABEE, M. G., and GERMAN, W. (1948), Ibid., 60, 340.
5. KUGELBURG, E. (1949), J. Neurol. Neurosurg. Psychiat., 12, 129.