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J.A.Z Pieterse; S Booneveld; R.W van den Brink. (2004). Evaluation of Fe-zeolite catalysts prepared by different methods for the decomposition of N2O. , 51(4), 215–228. doi:10.1016/j.apcatb.2004.02.013 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research