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Lowenson, Jonathan D.; Shmanai, Vadim V.; Shklyaruck, Denis; Clarke, Steven G.; Shchepinov, Mikhail S. . (2016). Deuteration protects asparagine residues against racemization. Amino Acids, 48(9), 2189–2196. doi:10.1007/s00726-016-2250-z 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research