References
- Dewley , W . 1986 . ‘Laser technology and analysis of materials.’ , Moscow : Publ Mir .
- Mazumder , I . 1983 . ‘Laser welding.’ , Publ North-Holland Publishing Company .
- Frolov , V V . 1970 . ‘Theoretical fundamentals of welding.’ , Moscow : Publ Vysshya Shkola .