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\begin{enumerate}   \item Goel et. al.(2015). The Structual Virality of Online Diffusion\cite{Goel_2015}   \item Dafna Shahaf, Carlos Guestrin (2012). Connecting the Dots between news articles Shahaf . \cite{Shahaf:2012:CTD:2086737.2086744} \item Ugander et al. (2012). Structural Diversity in Social Contagion \cite{Ugander_2012}  \end{enumerate} \\   \subsection{Product Adoption, Churn and Marketing}   \begin{enumerate}