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Ke, Yuyong; Bertin, Jonathan; Gonthier, Renaud; Simard, Jean-Nicolas; Labrie, Fernand . (2014). A sensitive, simple and robust LC–MS/MS method for the simultaneous quantification of seven androgen- and estrogen-related steroids in postmenopausal serum. The Journal of Steroid Biochemistry and Molecular Biology, 144(), 523–534. doi:10.1016/j.jsbmb.2014.08.015 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research