REFERENCES
- DAVISON , E. J. , 1966 , I.E.E.E. Trans. autom. Control , 11 , 93 .
- GLOVER , K. , 1984 , Int. J. Control , 39 , 1115 .
- KOKOTOVIC , P. V. , O'MALLEY , R. E. , and SANNUTI , P. , 1976 , Automatica , 12 , 123 .
- MOORE , B. G. , 1981 , I.E.E.E. Trans. autom. Control , 26 , 17 .
- WILLSON , D. A. , 1970 , Proc. Inst. elect. election. Engrs, Pt D , 117 , 1161 .