@book {bryson_offnungen._2009,
	title = {{\"O}ffnungen. Zur Theorie und Geschichte der Zeichnung},
	year = {2009},
	note = {THE 158},
	publisher = {Wilhelm Fink Verlag},
	organization = {Wilhelm Fink Verlag},
	author = {Bryson, Norman and Boehm, Gottfried and Bach, Friedrich Teja and andere}
}
