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Taft, R.C.; Menkus, C.A.; Tursi, M.R.; Hidri, O.; Pons, V.. (2004). A 1.8-V 1.6-GSample/s 8-b self-calibrating folding ADC with 7.26 ENOB at Nyquist frequency. , 39(12), 2107–2115. doi:10.1109/jssc.2004.836242 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research