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E. Mauriz; A. Calle; J.J. Manclús; A. Montoya; A. Hildebrandt; D. Barceló; L.M. Lechuga. (2007). Optical immunosensor for fast and sensitive detection of DDT and related compounds in river water samples. , 22(7), 1410–1418. doi:10.1016/j.bios.2006.06.016 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research