1. B. Delmon, Proc. 3rd Climax Conf. on Molybdenum (H.F. Barry and P.C.H. Mitchell, Eds.) Climax Co., Michigan, 1979, p.33.
2. Catalytic Hydrodesulfurization
3. F.E. Massoth and G. Muralidhar, Proc. 4th Climax Conf. on Molybdenum (H.F. Barry and P.C.H. Mitchell, Eds.,) Climax Co., Michigan, 1982, p.343.