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Tanwar, Shivani; Chuang, Min-Chieh; Prasad, K. Sudhakara; Ho, Ja-an Annie . (2012). Template-free synthesis of an electroactive Au-Calix-PPY nanocomposite for electrochemical sensor applications. Green Chemistry, 14(3), 799–. doi:10.1039/C2GC16232F 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research