@book{16220,
	author = {Sage, Andrew P.},
	title = {Optimum systems control},
	publisher = {Prentice-Hall},
	year = {1968},
	series = {Prentice-Hall electrical engineering series/edited by William L. Everitt},
	address = {Englewood cliffs, N.J.},
	note = {Includes Appendix and index}
}