@book{5374,
	author = {Gabisch, Gunter and Loranz, Hans-Walter and Loranz, Hans-Walter ; jt. auth},
	title = {Business cycle theory; a survey of methods and concepts},
	publisher = {Springer-Verlag},
	year = {1987},
	series = {Lecture notes in Economics and Mathematical systems},
	address = {Berlin}
}