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Alexander E. Yakovlev; Andrea T. Peterson. (2007). Peripheral Nerve Stimulation in Treatment of Intractable Postherpetic Neuralgia. , 10(4), 373–375. doi:10.1111/j.1525-1403.2007.00126.x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research