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A. Šarić; S. Popović; R. Trojko; S. Musić. (2001). The thermal behavior of amorphous rhodium hydrous oxide. , 320(1), 0–148. doi:10.1016/s0925-8388(01)00938-0 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research