1. Sistemi a grandi dimensioni;Guardabassi,1974
2. Optimal Estimation on Control of Elastic Spacecraft;Larson,1977
3. Feedback Control of Flexible Systems;Balas;IEEE Trans. on AC,1978
4. Modal Control of certain flexible dynamic Systems;Balas;SIAM Journ. Control and Optimization,1980
5. Distributed Control of spinning flexible Spacecraft;Meirovitch;Journ. of Guid. & Control,1979