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Zhai, Quan-Guo; Lu, Can-Zhong; Chen, Shu-Mei; Xu, Xin-Jiang; Yang, Wen-Bin. (2006). Design of Novel Three-Dimensional Coordination Polymers Based on Triangular Trinuclear Copper 1,2,4-Triazolate Units. , 6(6), 1393–1398. doi:10.1021/cg0600142 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research