1. Crome L, Stern J (1976) Inborn lysosomal enzyme deficiencies. In: Blackwood W, Corsellis JAN (eds) Greenfield’s neuropathology, 3rd edn. Edward Arnold, London, p 500
2. DeDuve C (1963) The lysosome concept. In: DeReuck AV, Cameron MP (eds) CIBA foundation symposium on lysosomes. J & A Churchill, London, pp 1–35
3. Harzer K, Benz HU (1976) Sphingomyelinosen (Niemann-Picksche Erkrankung) In: Schettler G, Greten H, Schlierf G, Seidel D (Hrsg) Handbuch der inneren Medizin, Bd VII/4. Springer-Verlag, Berlin Heidelberg New York, p 525
4. McKusick VA (1968) Mendelian inheritance in man: Catalogs of autosomal dominant, recessive, and x-linked phenotypes, 2nd edn. Johns Hopkins, Baltimore
5. Stanbury JB, Wyngaarden JB, Fredrickson DS (1978) The metabolic basis of inherited disease. 4. Auflage. McGraw-Hill Comp, New York