1. On Hereditary Ataxia and Spastic Paraplegia.;Bell, J.; Carmichael, E.A.,1939
2. Treas. hum. Inher., 4, Pt. 3, 141. Journal of Neurology, Neurosurgery and Psychiatry, 13, 134.
3. Biemond, A. (1928). Dtsch. Z. Nervenheilk., 104, 113.
4. Bogaert, L. van, and Moreau, M. (1940). Encephale, 34 (2), 312.
5. Boveri, P. Ferguson, (1911). Munch. med. F. R., and Critchley, Wschr., 58, M. (1928).