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Dehmer, Matthias; Sivakumar, Lavanya; Emmert-Streib, Frank . (2012). Recent Developments in Quantitative Graph Theory: Information Inequalities for Networks. PLoS ONE, 7(2), e31395–. doi:10.1371/journal.pone.0031395 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research