1. Principal component analysis in linear systems: Controllability, observability, and model reduction
2. 3Bernard, D. E. "On the Control of Lightly Coupled Large Space Structures," Ph.D. Dissertation,Dept. of Aeronautics and Astronautics, Stanford Univ., Stanford, CA,Oct. 1984.
3. 4Enns, D. "Model Reduction for Control System Design," Ph.D. Dissertation,Stanford Univ., Stanford, CA, June 1984.
4. Coupling of substructures for dynamic analyses.