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James L. Adcock; Mark L. Robin; Sharique Zuberi. (1987). Aerosol direct fluorination: orthoesters, syntheses of perfluoromethylorthocarbonate and perfluoroethylene orthocarbonate. , 37(3), 327–336. doi:10.1016/s0022-1139(00)81969-7 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research