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Qin, Li; Wang, Li-na; Ma, Pei-juan; Cui, Guang-hua . (2014). Structural modulation of Co(II) coordination polymers with flexible bis(benzimidazole) and different dicarboxylate ligands. Journal of Molecular Structure, 1059(), 202–207. doi:10.1016/j.molstruc.2013.11.043 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research