1. (a) Review about biocatalytic approaches: Gröger, H.; Drauz, K. InAsymmetric Catalysis on Industrial Scale; Blaser, H.U., Schmidt, E., Eds.; Wiley-VCH: Weinheim, 2003; pp 131−147.
2. (c) Review about chemocatalytic approaches via hydrogenation: Burk, M. J.; Bienewald, F. InTransition Metals for Organic Synthesis; Beller, M., Bolm, C., Eds.; Wiley-VCH: Weinheim, 1998; Vol. 2, p 13f.
3. Liese, A.; Seelbach, K.; Wandrey, C.Industrial Biotransformations; Wiley-VCH: Weinheim, 2000; pp 103−106.