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Chen Chen, Xinfeng Zhang, Zhou Long, Jiyou Zhang, Chengbin Zheng. (2012). Molecularly imprinted dispersive solid-phase microextraction for determination of sulfamethazine by capillary electrophoresis. , 178(3-4), 293–299. doi:10.1007/s00604-012-0833-2 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research