Hodnett, BK., & Delmon, B. (1984). Influence of Reductive Pretreatments On the Activity and Selectivity of Vanadium Phosphorus Oxide Catalysts for Normal-butane Partial Oxidation. Industrial and Engineering Chemistry Fundamentals, 23(4), 465-470. https://hdl.handle.net/2078.5/42604 (Original work published 1984)