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3. Weld repair of rail defects, Welding journal, 90 (2011) 42–44.
4. Federal Railroad Administration, Fractures and fatigue evaluation of slot-welded railhead repairs, RR08-26 (2008).
5. D. Workman and R. Kral, Flash butt wedge repair of weld head defects, Proceedings of the ASME/ASCE/IEEE Joint Rail Conference (2011) 1–7.