1. H. W. L. Phillips, Inst. Metals Monograph 25, 1959; Inf. Bull. 25, Aluminium Devel. Ass., London, 1961
2. H. Hanemann, etc., JIMMA 8, 326
3. G. Garmong, etc., Met A 4, 620219; 5, 120686
4. H. Nishimura, JIMMA 5, 250, 472, 473; 6, 4, 300; 7, 152
5. R. Kowatschewa, etc., Met A 6, 230624