1. Anderson, S. Marks, C.B., Lazarus, R., Miller, J., Stafford, K., Seymour, J., Light, D., Rastetter, W. and Estell, D (1985): Production of 2-keto-L-gulonate, an intermediate in L-ascorbate synthesis, by a genetically modified Erwinia herbicola. Science 230,144–149.
2. Barner, R. und Schmid, M. (1979): Totalsynthese von natürlichem α-Tocopherol. IV, Aufbau des Chromanringsystems aus Trimethylhydrochinon und einem optisch aktiven C4 bzw. C5-Synthon. Helv. Chim. Acta 62, 2384–2399.
3. Davies, H.G., Green, R.H., Kelly, D.R. and Roberts, S.M. (1989): Hydrolysis and condensation reactions. In: “Biotransformations in preparative organic chemistry”, Academic Press, London 1989, pp 25–98.
4. Delie, V., Sunic, D and Vlasic, D. (1989): Microbial reactions for the synthesis of Vitamin C (L-ascorbic Acid). In: “Biotechnology of Vitamins, Pigments and Growth Factors”, Ed. E.J. Vandamme, Elsevier, London and New York 1989, pp 299–334.
5. Dropsy, E.P. and Klibanov, A.M. (1984): Choline-esterase-catalyzed resolution of D,L-carnitine. Biotechnol. Bioeng. 26, 911–915.