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Padayachy, Llewellyn C.; Kilborn, Tracy; Carrara, Henri; Figaji, Anthony A.; Fieggen, Graham A. . (2015). Change in optic nerve sheath diameter as a radiological marker of outcome from endoscopic third ventriculostomy in children. Child's Nervous System, 31(5), 721–728. doi:10.1007/s00381-015-2655-0 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research