1. American Petroleum Institute. Recommended pipeline maintenance welding practices, API RP 1107, USA.
2. National Energy Board. In the matter of an Accident on 19 February 1985 near Camrose, Alberta, on the pipeline System of interprovincial Pipe Line Limited. National Energy Board Report, MH-2-85, June 1986.
3. Kniefner JF, Bruce WA, Stephens DR. Pipeline Repair Manual. AGA Cat. No. L51716, 1994.
4. Weld failures in sleeve reinforcements of pipelines;Otegui;Eng Failure Analysis,2001
5. Kiefner JF. Defect repair procedures. 6th Symposium on line pipe research. Houston, USA, 1979. p. I1.