Ralf Klamma Pham Manh Cuong Yiwei Cao You Never Walk Alone: Recommending Academic Events Based on Social Network Analysis. 657-670 2009 Complex (1) http://dx.doi.org/10.1007/978-3-642-02466-5_64 conf/complex/2009-1 db/conf/complex/complex2009-1.html#KlammaCC09