1. Albrecht, M. H., and Fernstrom, R. C., A modified Nauta-Gygax method for human brain and spinal cord, Stain Technol, 34 (1959) 91–94.
2. Bard, P., and Rioch, D. McK., A study of four cats deprived of neocortex and additional portions of the forebrain, Bull. Johns Hopk. Hosp., 60 (1937) 73–106.
3. Bechterew, W. von, Die Leitungsbahnen in Gehirn und Rückenmark, Georgi, Leipzig, 1899.
4. Cajal, S. Ramon y, Histologie du Système Nerveux de l’Homme et des Vertébrés, Vol. II, Maloine, Paris, 1911.
5. Crosby, E. C., and Woodburne, R. T., The nuclear pattern of non-tectal portions of the midbrain and isthmus in primates, J. comp. Neurol., 78 (1943) 441–520.