1. API 5L Specifications for line pipe, Forty fifth edition, Washington DC: API Publishing Services (2012).
2. J. Norrish, A review of metal transfer classification in arc welding (IIW DOC. XII-1769-03. Bucharest), Villepinte, France: International Institute of Welding (2003).
3. P. Kah, H. Latifi, R. Suoranta, J. Martikainen and M. Pirinen, Usability of arc types in industrial welding, International Journal of Mechanical and Materials Engineering (2014) 9–15.
4. J. F. Lancaster, The physics of welding, New York: International Institute of Welding (1984).
5. J. F. Lancaster, The physics of welding, 2nd edition, Oxford: International Institute of Welding (1986).