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Lu, Shao Jie; Liu, Xu; Cai, Zi Qing; Meng, Xiao Yu; Zhou, Qiong; Cui, Li Shan . (2014). The MMT/MCNTs/sPEEK Nanocomposite Membrane for Proton Exchange Membrane Fuel Cells. Applied Mechanics and Materials, 595(), 19–23. doi:10.4028/www.scientific.net/AMM.595.19 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research