1. T. S. Skoblo, N. M. Vorontsov, S. I. Rudyuk, N. A. Budagyants, and V. A. Voronina, Prokatnye Valki iz Vysokouglerodistykh Splavov [Roller Rolls Made of High-Carbon Alloys] (Moscow: Metallurgiya: 1994) (in Russian).
2. Union Electric Steel Corporation, http://www.akersrolls.com
3. Kaida Roll Group, http://www.kdroll.com
4. Marichal Ketin, http://www.mkb.be;
5. SMS group, https://www.sms-group.com