1. R.L. Hills, in: Power from Wind: A History of Windmill Technology, Cambridge University Press. (1996).
2. A. Akhgari, ꞉ Experimental investigation of the performance of a diffuser augmented vertical axis wind turbine, MSc. Thesis, Dept. of Mechanical Engineering, University of Victoria (2011).
3. M. Medaglia, in: Vertical Axis Wind Turbines: History, Technology and Applications, MSc. Thesis, Dept. of Energy Engineering, Univ. of Halmstad (2010).
4. R.W. Righter in: Wind Energy in America: A History: University of Oklahoma, (2003), in Press.
5. S. Heier: Grid Integration of Wind Energy Conversion Systems. New York: John Wilеу & Sons, Inc. (1988).