1. A. V. Balakrishnan: Class notes, course 229C, UCLA, Department of System Science.
2. Feedback control of linear distributed systems;Wiberg;J. Basic Engng ASME Trans. Series D,1967
3. On the separation principle for distributed parameter systems;Bensoussan,1971
4. Optimal control of a class of linear stochastic distributed parameter systems;Tzafestas,1968
5. Optimum control of a class of randomly excited distributed parameter systems;Thau,1969