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Oakland, Robert J.; Furtado, Navin R.; Wilcox, Ruth K.; Timothy, Jake; Hall, Richard M. . (2008). The biomechanical effectiveness of prophylactic vertebroplasty: a dynamic cadaveric study. Journal of Neurosurgery: Spine, 8(5), 442–449. doi:10.3171/spi/2008/8/5/442 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research