REFERENCES
- BIIEAKWELL , J. V. , SPEYER , J. L. , and BBYSON , A. E. , 1963 , J. Soc. Ind. appl. Math. Control, Series A , 1 , 193 .
- MCGILL , R. , and KENNETH , P. , 1963 , paper presented at the XIVth International Astro-nautical Congress , Paris .
- ROSEN , G. H. , 1909 , M.S. in Engineering , University of California , Los Angeles .
- †Communicated by Professor C. T. Leondes. This research was supported by AFOSR Grant 699-67.