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Ravy, Sylvain; Itié, Jean-Paul; Polian, Alain; Hanfland, Michael . (2007). High-Pressure Study of X-Ray Diffuse Scattering in Ferroelectric Perovskites. Physical Review Letters, 99(11), 117601–. doi:10.1103/PhysRevLett.99.117601 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research