1. Van Holten, Th. 1974 Computation of aerodynamic loads on helicopter rotorblades in forward flight, using the method of the acceleration potential. Proc. 9th Congr. Int. Counc. Aero. Sci., Icas, Haifa, Israel (ed. Robert R. Dexter & J. Singer ), paper 74-54.Jerusalem:Weizmann Science Press of Israel.
2. Fung, Y. C. 1968 An Introduction to the Theory of Aeroelasticity .Dover.
3. Van Holten, Th. 1976b On the validity of lifting line concepts in rotor analysis. 1st European Rotorcraft Powered Lift Aircraft Forum, Southampton, preprint 20. (To be published in Vertica,Int. J. Rotorcraft Powered Lift Aircraft, vol.1, (1976) no. 3.)
4. Lagerstrom, P. A. (ed.)1967 Fluid Mechanics and Singular Perturbations, A Collection of Papers by Saul Kaplun .Academic.
5. Moon, P. & Spencer, D. E. 1961 Field Theory for Engineers .Van Nostrand.