1. H. S. Witsenhausen, IEEE Trans. Autom. Control
AC-13, 556 (1968).
2. F. C. Schweppe, IEEE Trans. Autom. Control
AC-13, 22 (1968).
3. F. C. Schweppe, Uncertain Dynamic Systems, Prentice Hall, Englewood Cliffs, NJ (1973).
4. J. F. Traub and H. Wozniakowski, A General Theory of Optimal Algorithms. Academic Press, New York (1980).
5. M. Milanese and R. Tempo, IEEE Trans. Autom. Contr.
AC-30, 730 (1985).