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Anastasia Zikou; Maria-Christina Ioannidou; Meropi Tzoufi; Loukas Astrakas; Maria I. Argyropoulou. (2005). Magnetization transfer ratio measurements of the brain in children with tuberous sclerosis complex. , 35(11), 1071–1074. doi:10.1007/s00247-005-1539-y 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research