1. Weber T (2010) Am laufenden band (Continuously production). In: Neue energie. vol 4. pp 66–73
2. Hader M (2010) From Pioneer to Mainstream—Evolution of wind energy markets and implications for manufacturers and suppliers. Roland Berger Study
3. Iken J, Thomas T (2011) Fließender Übergang (Fluid transition). In: Sonne, wind und wärme, vol 2
4. Hau E (2008) Windkraftanlagen—Grundlagen, Technik, Einsatz, Wirtschaftlichkeit (Wind turbines—basics, engineering, application, profitability). vol 4. Springer
5. Monville JM (2005) Hydraulic bolt tensioners for accurate, safe and secure tightening. Evolution—the business and technology magazine from SKF, vol 3