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Widmer, A. X.; Franaszek, P. A. . (1983). A DC-Balanced, Partitioned-Block, 8B/10B Transmission Code. IBM Journal of Research and Development, 27(5), 440–451. doi:10.1147/rd.275.0440 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research