Matralis, HK., Lycourghiotis, A., Grange, P., & Delmon, B. (1988). Fluorinated Hydrotreatment Catalysts - Characterization and Hydrodesulfurization Activity of Fluorine Cobalt Molybdenum Gamma-alumina Catalysts. Applied Catalysis A: General, 38(2), 273-287. https://doi.org/10.1016/S0166-9834(00)82831-6 (Original work published 1988)