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Chen, Hong-Xia; Zhou, Feng; Ma, Yong; Xu, Xiao-Ping; Ge, Jian-Feng; Zhang, Yong; Xu, Qing-Feng; Lu, Jian-Mei . (2013). Preparation of coordination polymers with 8-hydroxyquinoline azo benzensulfonic acid as a planar multidentate ligand and the study of their photochemical and photo-stability properties. Dalton Transactions, 42(14), 4831–. doi:10.1039/C2DT32381H 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research