1. Anon., “Brittle Fracture of a Thick Walled Pressure Vessel” [reprinted from BWRA Bulletin,7,6 (June 1966)] Welding Research Abroad, XII, Welding Research Council (October 1966).
2. Schock, W., “Report on Drum Failures,” Mitterlungen der Vereinigung Der Grosskesselbesitzer (April 1966).
3. Wellinger, K. and Krageloh, E., “Spannungen in Kessltrommeln,” Mitterlungen der Vereingung Der Grosskesselbesitzer (June 1964).
4. Markl, A. R. C., “Fatigue Test of Welding Elbows and Comparable Double-Mitre Bends,” Transaction ASME,69 (1947).
5. Markel, A. R. C., “Piping Flexibility Analysis,” Transactions ASME,77 (1955).