1. AHMED , N. , 1972 ,Proc. I.E.E.E. Conf. on Decision and Control, pp. 495 – 498 .
2. ANDREWS , H. C. , 1971 ,Proc. Wahh Function Symp.( Washington , D.C Naval Res. Labs. ), pp. 20 – 32 ; 1972,Proc. of I.E.E.E. Conf. on Decision and Control.pp. 492–494 .
3. CARL , J. W. , and KAUIUSKY , M. , 1971 ,Proc. Walsh Function Symp.( Washington , D.C Naval Res. Labs ), pp. 203 – 209 .
4. CHEN , C. , 1972 ,Proc. Walsh Function Symp.( Washington , D.C. Naval Res. Labs ), pp. 64 – 07 .
5. CLARK , M. T. , SWANSON , J. E. , and SANDERS , J. A. , 1972 ,Proc. Walsh Function Symp.( Washington , D.C. Naval Res. Labs ), pp. 169 – 172 .