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Spuller, M. T.; Perchuk, R. S.; Hess, D. W. . (2005). Evaluating Photoresist Dissolution, Swelling, and Removal with an In Situ Film Refractive Index and Thickness Monitor. Journal of The Electrochemical Society, 152(1), G40–. doi:10.1149/1.1817716 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research