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J. Sotola; Z. Knor. (1994). Field Emission Microscopy Study of Supported Bimetallic Catalysts Pd-Mo/Al2O3/W: Nitrogen Spillover. , 145(2), 501–507. doi:10.1006/jcat.1994.1060 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research