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2. BS5500:1997. British standard specification for unfired fusion welded pressure vessels. Annex C. UK: British Standards Institution.
3. AS1210 Supplement 1-1990. Unfired pressure vessels — Advanced design and construction (supplement to AS1210-1989). Appendix C. Sydney: Standards Australia.
4. British standards institution boiler and pressure vessel design criteria;Houston,1987
5. Wöhler, A. Versuche über die Festigkeit der Eisenbahnwagenachsen. Zeitshrift für Bauwesen, 1860. In: ASM handbook, vol. 19: fatigue and fracture. OH: ASM International, 1996. p. 15.