Maity, S. K.; Ballal, N. B.; Goldhahn, G.; Kawalla, R.: Development of ultrahigh strength low alloy steel through electroslag refining process, ISIJ International 49 (2009), S. 902-910.

Pupke, F.; Ouchanin, S.; Kawalla, R.; Jost, N.; Ziiiy, A.: Development and fatigue testing of dropper conductors of overhead contact lines, eb - Elektrische Bahnen 107 (2009), S. 77-82.