References

1. Welding and Metal Fabrication v.57 no.7 Developments in power beams - a Welding Institute update
2. Welding Handbook(7th ed.) v.3 AWS
3. Electron beam welding: Principles and Practice Meleka.A. H(ed.)
4. Electron beam welding Schwartz M. M.
5. Ultra high energy density heat source and heat processing Development of ultra high energy heat sources and their application to hot processing Arata Y.(et.al.)