1. J. Pastuhova, A. Rachshtadt, Pruginnie splavi medi (Spring Copper Alloys) (Moscow: Metallurgy: 1979).
2. W. A. Soffa, D. E. Laughlin, Prog. Mater. Sci., 2004 (in press).
3. W. Z. Kroll, Z. Metallkd., 23: 33 (1931).
4. E. E. Shumacher, W. C. Ellis, Metals Alloys, 2: 111 (1931).
5. F. R. Hensel, E. I. Larsen, Trans. AIME, 99: 55 (1932).