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Woo, Jong-Chang; Chun, Yoon-Soo; Joo, Young-Hee; Kim, Chang-Il . (2012). Low leakage current in metal-insulator-metal capacitors of structural Al2O3/TiO2/Al2O3 dielectrics. Applied Physics Letters, 100(8), 081101–. doi:10.1063/1.3687702 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research