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J. Sági; E. De Clercq; A. Szemző; Á. Csárnyi; T. Kovács; L. Ötvös. (1987). Incorporation of the carbocyclic analogue of (E)-5-(2-bromovinyl)-2′-deoxyuridine 5′-triphosphate into a synthetic DNA. , 147(3), 0–1112. doi:10.1016/s0006-291x(87)80184-5 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research