@book{13447,
	author = {Degenne, Alain. and Fors�e, Michel. and ebrary, Inc.},
	title = {Introducing social networks},
	publisher = {SAGE,},
	year = {1999.},
	series = {Introducing statistical methods},
	address = {London ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10256916}
}