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P.M. Burgers;F. Eckstein;. (1980). Structure of metal x nucleotide complex in the creatine kinase reaction. A study with diastereomeric phosphorothioate analogs of adenosine di- and triphosphate. . Journal of Biological Chemistry, (), –. doi:10.1016/s0021-9258(19)70635-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research