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Meza, J.L.; Santibanez, V.; Soto, R.; Llama, M.A.. (2012). Fuzzy Self-Tuning PID Semiglobal Regulator for Robot Manipulators. , 59(6), 0–2717. doi:10.1109/tie.2011.2168789 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research
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