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Tsanidis, N.; Antonarakis, G. S.; Kiliaridis, S. . (2016). Functional changes after early treatment of unilateral posterior cross-bite associated with mandibular shift: a systematic review. Journal of Oral Rehabilitation, 43(1), 59–68. doi:10.1111/joor.12335 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research