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Weijun Li; Dandan Liu; Fangzhong Shen; Dongge Ma; Zhiming Wang; Tao Feng; Yuanxiang Xu; Bing Yang; Yuguang Ma. (2012). A Twisting Donor-Acceptor Molecule with an Intercrossed Excited State for Highly Efficient, Deep-Blue Electroluminescence. , 22(13), 0–0. doi:10.1002/adfm.201200116 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research