1. Okafor, N., Modern Industrial Microbiology and Biotechnology, Enfield (NH, USA): Science Publishers, 2007, pp. 429–454.
2. Mosier, N.S. and Ladisch, M.R., Modern Biotechnology: Connecting Innovations in Microbiology and Biochemistry to Engineering Fundamentals, Hoboken (NJ, USA): Wiley&Sons, 2009, pp. 27–48.
3. Buchholz, K. and Collins, J., Concepts in Biotechnology: History, Science and Business Paperback, Weinheim: Willey-VHC Verlag GmbH & Co. KGaA, 2011.
4. Schmidt, F.-R., in Handbook of Pharmaceutical Biotechnology, Gad, S.C., Ed., Hoboken (NY, USA): Wiley-Interscience, 2007, pp. 1–52
5. Biotechnology: Environmental Processes III (Biotechnology: A Multi-Volume Comprehensive Treatise, 2nd Completely Rev. Ed.), Klein, J. and Winter, J., Eds., Weinheim: Willey-VHC Verlag GmbH & Co. KGaA, 2000, vol. 11c.