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W. K. Jung; Prof. Dr. R. Schweisfurth. (1979). Manganese oxidation by an intracellular protein of a <em>Pseudomonas</em> species. , 19(2), 107–115. doi:10.1002/jobm.19790190206 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research