1. M. Grünfeld, French Patent No. 866 545 to Rhône Poulenc (1940).
2. G. Bartalini G. Giuggioli, French Patent No. 2 068 953 to Rhodiatoce, (1969).
3. L. L. Oden P. E. Sanker J. H. Russel, U. S. Bureau of Mines, Report of Investigation No. 8184, (1976).
4. Fibrous hydrogenation catalysts derived from NiAl eutectic alloys