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Berezhnoy, V. L.; Voitsenya, V. S.; Ocheretenko, V. L.; Schtan, A. P.; Tkachenko, V. M.; Topkov, A. N. . (1996). Carbon-graphite elements of submillimeter diagnostics of a high temperature plasma. Plasma Devices and Operations, 5(1), 59–70. doi:10.1080/10519999608228827 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research