@book{16370,
	author = {Balakrishnan, A. V. },
	title = {Control theory and the calculus of variations},
	publisher = {Academic Press,},
	year = {1969},
	address = {New York:},
	note = {"Based on the lectures presented at the workshop on calculus of variations and control theory, University of California, Los Angeles, July 1968".}
}