@book{20365,
	author = {Schöning, Uwe},
	title = {Complexity and structure},
	publisher = {Springer-Verlag,},
	year = {1986},
	address = {Berlin :},
	note = {"Revised and extended version of a thesis submitted to ... the University of Stuttgart, Germany, in partial fulfillment of the German "Habilitation" degree"--Pref.}
}