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2. SO2 emission reduction by Topsøe's new VK-701 LEAP5™ catalyst;Christensen;Sulfuric Acid Today,2011
3. Improving sulfuric acid plant performance with MECS’ new GEAR catalysts;Felthouse;Sulfuric Acid Today,2011
4. Phase equilibria of the system sulfur trioxide-water;Gable;J. Am. Chem. Soc.,1950
5. Sulphur based by-products from the non-ferrous metals industry;King,2009