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Masuzawa, M; Terashima, A; Tsuchiya, K; Ueki, R . (2017). Magnetic shielding for superconducting RF cavities. Superconductor Science and Technology, 30(3), 034009–. doi:10.1088/1361-6668/aa570b 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research