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Li, Bo; Qin, Ke; Xiao, Bing; Yang, Yongsheng . (2019). Finite-time Extended State observer based fault tolerant output feedback control for attitude stabilization. ISA Transactions, (), S0019057819300643–. doi:10.1016/j.isatra.2019.01.039 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research