Berteau, P., Ceckiewicz, S., & Delmon, B. (1987). Role of the Acid-base Properties of Aluminas, Modified Gamma-alumina, and Silica-alumina in 1-butanol Dehydration. Applied Catalysis A: General, 31(2), 361-383. https://doi.org/10.1016/S0166-9834(00)80702-2 (Original work published 1987)