1. Klein, D., “Proc. 3rd Intern. Cong. Human Genetics,” J. F. Crow and J. V. Neel, editors, The Johns Hopkins Press, Baltimore, 1967, p. 369.
2. Aronson, S. A., and B. w. Volk, editors, “Inborn Disorders of Sphingolipid Metabolism,” Pergamon Press, Oxford, 1967.
3. Sachs, B., New York Med. J.63, 697 (1896).
4. Vogt, H., Arch. Kinderheilk,51, 1 (1909).
5. Klenk, E. Z., physiol. Chem.262, 128 (139).