REFERENCES
- CHEN , C. F. 1974 , Int. J. Control , 20 , 225 .
- COLFE , M. R. and HEALEY , M. , 1974 , Proc. Instn elect. Engrs ,. 121 , 393 .
- GOLDMAN , M. J. and LEONDES , C. T ., 1977 , Int. J. Control ,. 25 , 979 .
- MEIER , L. and LUENBERGER , D. D. , 1966 , Proc. Joint Conf, autom. Control ,.p. 728 .
- RICE , J. R. 1964 , The Approximation of Functions ( Reading , Mass . Addison-Wesley ).
- SHIEH , L. S. and GAUDIANO , F. F ., 1974 , Int. J. Control ,. 20 , 727 .
- SHIEH , L. S. NAVAROV , J. M ., and YATES , R. , 1974 , Proc. Inst, elect, electron. Engrs , 62 , 1169 .
- SHIEH , L. S. and WEI , Y. J. , 1975 , Proc. Instn elect. Engrs ,. 122 , 1159 .
- WILSON , D. A. 1970 , Proc. Insln elect, Engrs ,. 117 .