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Klimenko, M.V.; Klimenko, V.V. . (2012). Disturbance dynamo, prompt penetration electric field and overshielding in the Earth’s ionosphere during geomagnetic storm. Journal of Atmospheric and Solar-Terrestrial Physics, 90-91(), 146–155. doi:10.1016/j.jastp.2012.02.018 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research