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Shabrawy, S. El; Bocker, C.; Miglierini, M.; Schaaf, P.; Tzankov, D.; Georgieva, M.; Harizanova, R.; Rüssel, C. . (2017). Mössbauer study and magnetic properties of MgFe2O4 crystallized from the glass system B2O3/K2O/P2O5/MgO/Fe2O3. Journal of Magnetism and Magnetic Materials, 421(), 306–315. doi:10.1016/j.jmmm.2016.08.021 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research