1. J.H. Sinfelt, Bimetallic Catalysts: Discoveries, Concepts, and Applications, Wiley, New York, 1983.
2. H.E. Kluksdahl, US Patent 3415737 (1968).
3. J.H. Sinfelt, US Patent 3953368 (1976).
4. F.M. Dautzenberg, Patent German Offenlegungsschrift 2121765 (1971).