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Pfeffer, Jürgen & Pfeffer, Jeffrey (2015). Another article that makes bibliometric analysis a bit harder. SIGBOVIK 2015, April 1st., Pittsburgh, PA. pdf

Lamba, Hemank & Malik, Momin M. & Nakos, Constantine & Pfeffer, Jürgen (2015). Rich People Don't Have More Followers! Overcoming Social Inequality With Social Media. SBP 2015 Grand Data Challenge, March 31, 2015, Washington DC. pdf