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Guofu Zhang; Renhua Liu; Qing Xu; Lixin Ma; Xinmiao Liang. (2006). Sodium Nitrite-Catalyzed Oxybromination of Aromatic Compounds and Aryl Ketones with a Combination of Hydrobromic Acid and Molecular Oxygen under Mild Conditions. , 348(7-8), 862–866. doi:10.1002/adsc.200505495 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research