References
- HAZELL , P. A. , and FLOWER , J. O. , 1970 , Proc. Inatn elect. Engrs , 117 , 1405 ; 1971, Int. J. Control, 13, 549 .
- LINDORFF , D. P. , 1965 , Theory of Sampled-data Control Systems ( New York Wiley ).
- MACFARLANE , A. C. J. , 1968 , Proc. Instn elect. Engrs , 115 , 1195 ; 1970, Proc. Inatn elect. Engrs, 117, 1039 .
- Miwno , N. , and SABOUNI , B. , 1970 , Int. J. Control , 11 , 303 .
- †Communicated by Professor J. C. West.