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Herzet, C.; Woradit, K.; Wymeersch, H.; Vandendorpe, L.. (2010). Code-Aided Maximum-Likelihood Ambiguity Resolution Through Free-Energy Minimization. , 58(12), 6238–6250. doi:10.1109/tsp.2010.2068291 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research