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Dominique Moulin; Christophe Darcel; Sylvain Jugé. (1999). Versatile synthesis of P-chiral (ephedrine) AMPP ligands via their borane complexes. Structural consequences in Rh-catalyzed hydrogenation of methyl α-acetamidocinnamate. , 10(24), 4729–4743. doi:10.1016/s0957-4166(99)00510-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research