@book{11437,
	author = {Girsanov, Igor Vladimirovich and Poljak, B. T. ; ed.},
	title = {Lectures on mathematical theory of extremum problems},
	publisher = {Springer-Verlag},
	year = {1972},
	series = {Lecture notes in Economics and Mathematical systems},
	address = {Berlin},
	note = {"Translated from the Russin by D. Louvish"}
}