1. Beorstoel, J. W.: Review of application of hodograph theory to transonic airfoil design and theoretical and experimental analysis of shock free airfoils. Symposium Transonicuum II, pp. 109?133 (Oswatitsch, K., Rues, D., eds.). Springer-Verlag 1975.
2. Sobieczky, H.: Entwurf überkritischer Profile mit Hilfe der rheoelektrischen Analogie. DLR-FB 75-43, Germany, 1975.
3. Bauer, F., Garabedian, P., Korn, D., Jameson, A.: Supercritical wings II. Lecture Notes in Economics and Mathematical Systems No. 108. Springer-Verlag 1975.
4. Hicks, R. M., Murman, E. M., Vanderplaats, G. N.: An assessment of airfoil design by numerical optimization. NASA TMX 3092, 1974.
5. Vanderplaats, G. N., Hicks, R. M., Murman, E. M.: Application of numerical optimisation techniques to airfoil design. NASA SP 347, pp. 749?768, Aerodynamic analysis requiring advanced computer, part II, U.S.A., 1975.