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Kory, Stephan N.. (2008). A Remarkably Resonant and Resilient Tang-dynasty Augural Stone: Empress Wu's <i>Baotu</i>. Tang Studies, 2008(26), 99–124. doi:10.1179/073750308790779350 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research