1. Wing characteristics as affected by protuberances of short span;Eastman JN;National Advisory Committee for Aeronautics,1932
2. Airfoil section characteristics as affected by protuberances;Jacobs EN;National Advisory Committee for Aeronautics,1932
3. HookerRW.The aerodynamic characteristics of airfoils as affected by surface roughness. NACA‐TN‐457 Langley Memorial Aeronautical Laboratory;1933.https://ntrs.nasa.gov/citations/19930081309
4. Summary of the Delft University Wind Turbine Dedicated Airfoils