@inbook {2464,
	title = {How Can the Mind Participate in Communication},
	booktitle = {Materialities of Communication},
	year = {1994},
	publisher = {Standford University Press},
	organization = {Standford University Press},
	address = {Standford},
	author = {Luhmann, Niklas},
	editor = {Gumbrecht, Hans Ulrich and Pfeiffer, Ludwig K.}
}
