1. Theory of Elastic Stability;Timoshenko,1961
2. Cylindrical elastical concentrating solar collectors;Tan,1979
3. Elastically-deformed, Linear focusing solar Reflector;Powell,1979
4. R. A. Powell, U.S. Pat. 4 119 365 (1978).
5. R. E. Dame, U.S. Pat. 4 106 484 (1978).