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Han Zhang; Fei Zhao; Fanglin Chen; Changrong Xia. (2011). Nano-structured Sm0.5Sr0.5CoO3 − δ electrodes for intermediate-temperature SOFCs with zirconia electrolytes. , 192(1), 591–594. doi:10.1016/j.ssi.2010.05.024 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research