@inbook{Houben,
	author          = {K. Tao, C. Hauff, F. Abel, G.J. Houben},
	title           = {Twitter and Society},
	chapter         = {Information Retrieval for Twitter Data},
	publisher       = {Peter Lang},
	year            = {2013},
	editor          = {K. Weller, A. Bruns, J. Burgess, M. Mahrt, C. Puschmann },
	pages           = {195-206},
	isbn            = {978-1-4331-2169-2},
	group           = {WIS}
}