References
- F. Lenel, USA Patent No. 2226520, 1940.
- F. Naeser et at., UK Patent No. 1155918, 1969.
- P. Lindskog and A. Carlsson, Powder Met. Int., 1972, 4, 1.
- N. Dautzenberg, ‘Second European Symposium on Powder Metallurgy’ 1968, Stuttgart, paper No. 6-18.
- F. Eisenkolb, Arch. Eisenhfittenwesen, 1953, 24, 257.
- H. Rebsch Neue Butte, 1965, 10, 335.
- W. A. Spitzig, Met. Trans., 1972, 3, 1183.
- G. Bockstiegel, Powder Met., 1969, 12, 316.
- Patents pending.