1. Analysis of periodically time varying systems. Communications and control engineering series;Richards,1983
2. Some analysis methods for rotating systems with periodic coefficients;Dugundji;AIAA Journal,1983
3. Modal control of an unstable periodic orbit;Wiesel;Journal of the Astronautical Sciences,1983
4. Design and evaluation of state feedback vibration controller;Du Val;Journal of american helicopter society,1984
5. Dynamic response analysis of the rotating blade of horizontal axis wind turbine;Liu;Wind Engineering,1985