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Ana Paula Vieira Soares; Manuel Farinha Portela; Alain Kiennemann; Lionel Hilaire. (2003). Mechanism of deactivation of iron-molybdate catalysts prepared by coprecipitation and sol–gel techniques in methanol to formaldehyde oxidation. , 58(7), 1315–1322. doi:10.1016/s0009-2509(02)00573-0 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research