1. 1) W. Patterson: Giesserei 46 (1959) 289–301.
2. 2) G. F. Sergenant and E. R. Evans: Foundryman (1978-5) 115–124.
3. 3) W. A. Henning and J. Merther ed.: Ductile Iron Handbook, (American Foundrymen’s Soc. Inc., 1992) pp. 31–36.
4. 4) A. Thum and H. Ude: Die Giesserei 16 (1929) 501–513,
5. 5) A. Thum and H. Ude: Die Giesserei 16 (1929) 547–556.