Evensen(1976)Vibration analysis of multisymmetric structures Hussey(1967)General theory of cyclically symmetric frames Irons Ahmad(1980)Techniques of finite elements Chapter 19 symmetry Chapter 20 sectorial symmetry MacNeal Harder Mason(1973)Nastran cyclic symmetry capability Pamidi(1988)Cyclic symmetry usage in Nastran Ramamurti Seshu(1990)On the principle of cyclic symmetry in machine dynamics Thomas(1974)Standing waves in rotationally periodic structures Thomas(1979)Dynamics of rotationally periodic structures Zienkiewicz Scott(1972)On the principle of repeatability and its application in analysis of turbine and pump impellers