Silvy, RP., Grange, P., Delannay, F., & Delmon, B. (1989). Influence of the Nature of the Activating Molecules On the Catalytic Activity of Cobalt Molybdenum Alumina Catalysts. Applied Catalysis A: General, 46(1), 113-129. https://doi.org/10.1016/S0166-9834(00)81398-6 (Original work published 1989)