1. Bongers, P. (1994), ‘Modeling and Identification of Flexible Wind Turbines and a Factorization Approach to Robust Control’, Ph.D., thesis, Delft University of Technology, Netherlands
2. Casavola, A. and Mosca, E. (1989), ‘On the Polynomial Solution of the H∞ Generalized Sensitivity Minimization Problem’, inProceedings of the 29th Conference on Design and Control, Tampa, FL, pp. 1500–1505