B. Hauer, M. Breuer, K. Ditrich, M. Matuschek, M. Ress-Löschke, and R. Stürmer, “The Development of Enzymes for the Preparation of Chemicals”, Chimia, vol. 53, no. 12, p. 613, Dec. 1999, doi: 10.2533/chimia.1999.613.