1. Lindenburg, C. (2003). Investigation into rotor blade aerodynamics-analysis of the stationary measurements on the UAE phase-VI rotor in the NASA-Ames wind tunnel. Energy Research Centre in the Netherlands (ECN), Petten, The Netherlands, Tech. Rep. No. ECN C-03-025;
2. Somers. D. M. (1989). Design and Experimental Results for the S809 Airfoil. Airfoils. Inc. State College. PA;
3. Ramsay R. F. et al. (1995). Effects of Grit Roughness and Pitch Oscillations on the S809;
4. Butterfield, C. P., Musial, W. P., & Simms, D. A. (1992). Combined Experiment Phase 1. Final report (No. NREL/TP (257-4655). National Renewable Energy Lab., Golden, CO (United States);
5. Eppler, R. (Uni of Stuttgart), and Somers, D. (Langley Research Center) (1980): A Computer Program for the Design and Analysis of Low-Speed Airfoils. NASA Technical Memorandum 80210;