1. Standard EN 1011–1: 1998. CEN 1998, 18 p.
2. Standard EN 1011–2: 2001. CEN 2001, 57 p.
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4. Suzuki H., Yurioka N.: Australian Welding Journal, vol. 27, No. 1: Autumn 1982, pp. 9–27.
5. Nevasmaa P., Kantanen M.-S. and Pan L.: Report AVAL64–001029: WM-HICC VTT/2. VTT, Espoo 2000, 66 p.