1. E.B. Larsen, U-shape and/or nozzle U-loop fermentor and method of carrying out a fermentation process, US Patent 6492135B1 (2002).
2. Loop reactors;Blenke;Adv. Biochem. Eng.,1979
3. Bio-Reaction Engineering Principles;Nielsen,2003
4. L. Jørgensen, Method and means for the production of a microorganism cell mass, EP Patent 0306466A2 (1989).
5. L. Jørgensen, H. Eriksen, S. Kurt, Method of fermentation, WO Patent 016460A1 (2003).