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Zhan, Siyuan; Na, Jing; Li, Guang . (2019). Nonlinear Noncausal Optimal Control of Wave Energy Converters via Approximate Dynamic Programming. IEEE Transactions on Industrial Informatics, (), 1–1. doi:10.1109/tii.2019.2935236 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research