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El-Naggar, Mahmoud; Elsobky, Emad; Ali-El-Dein, Bedeir . (2016). MP58-17 DOES MATRIX MATERIAL AFFECT URINARY STONE FORMATION AND COMPOSITION?. The Journal of Urology, 195(4), e782–e783. doi:10.1016/j.juro.2016.02.815 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research