Martin Gneiser Julia Heidemann Mathias Klier Andrea Landherr Florian Probst Quantifying Users' Interconnectedness in Online Social Networks - An Indispensible Step for Economic Valuation. 246-258 2009 AMCIS/SIGeBIZ http://dx.doi.org/10.1007/978-3-642-03132-8_20 conf/amcis/2009sigebiz db/conf/amcis/sigebiz2009.html#GneiserHKLP09