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Huang, Jun; Li, Zhe; Liaw, Bor Yann; Zhang, Jianbo . (2016). Graphical analysis of electrochemical impedance spectroscopy data in Bode and Nyquist representations. Journal of Power Sources, 309(), 82–98. doi:10.1016/j.jpowsour.2016.01.073 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research